Photo: BACKGRIDKim Kardashianwas giving Batgirl vibes atKhloé Kardashian’s birthday bash.The star, 41, strutted into the celebration in Beverly Hills, California, on Monday night wearing a stylish superhero ensemble featuring a skin-tight, black leather outfit and extra-large black sunglasses.From the Mask Butterfly glasses to her Pantaleggings theSKKN founderwas dripping inBalenciagato mark her sister’s 38th Birthday.The 41-year-old entrepreneur also showed off her toned abs in a black leather crop top with a plunging neckline which she paired perfectly with the high-waisted pantashoes — a hybrid clothing item that combines skin-tight leggings with built-in stilettos.Khloé Kardashian celebrates her 38th birthday.Kim Kardashian InstagramThe mother-of-four accessorized the look with the luxury brand’s mini, metallic silver croc-embossed handbag, which features a rhinestone-covered B-shaped clasp.Khloé also sported a skin-tight look for her birthday celebration, however, the birthday girl’s version was in stark contrast to Kim’s all-black outfit. The Good American founder wore a hot pink latex dress for her special day.With matching vibrant pink heels, a blonde, straight lob and gorgeous glam makeup, Khloé looked like a stylish real-lifeBarbie.Before the sisters got all dressed up for the big night,Kim gave Khloé some birthday love on Instagram, calling her “my number 1 ride or die” in a carousel post full of candid photos of the two enjoying slices of pizza.“I feel so blessed to be your sister and call you my best friend! No one in this planet deserves the happiness and blessings that are coming your way,” wrote Kim. “Every single person that is blessed to be close to you is a better person because of you. I am so proud of your heart and how genuine you are.“Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.The SKIMS founder continued, “You are always true to yourself and always want what’s best for others! Your heart is so pure that I can feel all of the best energy coming your way. I love you so much and couldn’t get through this life without you ✨♾.”

Photo: BACKGRID

Platinum-haired Kim Kardashian gets prepped for Khloe’s Birthday dinner in killer leather outfit!

Kim Kardashianwas giving Batgirl vibes atKhloé Kardashian’s birthday bash.The star, 41, strutted into the celebration in Beverly Hills, California, on Monday night wearing a stylish superhero ensemble featuring a skin-tight, black leather outfit and extra-large black sunglasses.From the Mask Butterfly glasses to her Pantaleggings theSKKN founderwas dripping inBalenciagato mark her sister’s 38th Birthday.The 41-year-old entrepreneur also showed off her toned abs in a black leather crop top with a plunging neckline which she paired perfectly with the high-waisted pantashoes — a hybrid clothing item that combines skin-tight leggings with built-in stilettos.Khloé Kardashian celebrates her 38th birthday.Kim Kardashian InstagramThe mother-of-four accessorized the look with the luxury brand’s mini, metallic silver croc-embossed handbag, which features a rhinestone-covered B-shaped clasp.Khloé also sported a skin-tight look for her birthday celebration, however, the birthday girl’s version was in stark contrast to Kim’s all-black outfit. The Good American founder wore a hot pink latex dress for her special day.With matching vibrant pink heels, a blonde, straight lob and gorgeous glam makeup, Khloé looked like a stylish real-lifeBarbie.Before the sisters got all dressed up for the big night,Kim gave Khloé some birthday love on Instagram, calling her “my number 1 ride or die” in a carousel post full of candid photos of the two enjoying slices of pizza.“I feel so blessed to be your sister and call you my best friend! No one in this planet deserves the happiness and blessings that are coming your way,” wrote Kim. “Every single person that is blessed to be close to you is a better person because of you. I am so proud of your heart and how genuine you are.“Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.The SKIMS founder continued, “You are always true to yourself and always want what’s best for others! Your heart is so pure that I can feel all of the best energy coming your way. I love you so much and couldn’t get through this life without you ✨♾.”

Kim Kardashianwas giving Batgirl vibes atKhloé Kardashian’s birthday bash.

The star, 41, strutted into the celebration in Beverly Hills, California, on Monday night wearing a stylish superhero ensemble featuring a skin-tight, black leather outfit and extra-large black sunglasses.

From the Mask Butterfly glasses to her Pantaleggings theSKKN founderwas dripping inBalenciagato mark her sister’s 38th Birthday.

The 41-year-old entrepreneur also showed off her toned abs in a black leather crop top with a plunging neckline which she paired perfectly with the high-waisted pantashoes — a hybrid clothing item that combines skin-tight leggings with built-in stilettos.

Khloé Kardashian celebrates her 38th birthday.Kim Kardashian Instagram

Khloe Kardashian Birthday

The mother-of-four accessorized the look with the luxury brand’s mini, metallic silver croc-embossed handbag, which features a rhinestone-covered B-shaped clasp.

Khloé also sported a skin-tight look for her birthday celebration, however, the birthday girl’s version was in stark contrast to Kim’s all-black outfit. The Good American founder wore a hot pink latex dress for her special day.

With matching vibrant pink heels, a blonde, straight lob and gorgeous glam makeup, Khloé looked like a stylish real-lifeBarbie.

Before the sisters got all dressed up for the big night,Kim gave Khloé some birthday love on Instagram, calling her “my number 1 ride or die” in a carousel post full of candid photos of the two enjoying slices of pizza.

“I feel so blessed to be your sister and call you my best friend! No one in this planet deserves the happiness and blessings that are coming your way,” wrote Kim. “Every single person that is blessed to be close to you is a better person because of you. I am so proud of your heart and how genuine you are.”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

The SKIMS founder continued, “You are always true to yourself and always want what’s best for others! Your heart is so pure that I can feel all of the best energy coming your way. I love you so much and couldn’t get through this life without you ✨♾.”

source: people.com