Olivia Gail O'Brien (born November 26, 1999) is an American singer.
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Kylie Jenner's pal Stassie Karanikolaou and beau Jaden Hossler hold hands after enjoying a double date with Justin and Hailey Bieber
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Kylie Jenner's pal Stassie Karanikolaou models a VERY plunging dress as she joins Emily Ratajkowski and Julia Fox at PrettyLittleThing show
Besties for Life! Looking Back at Kylie Jenner and Stassie Karanikolaou’s Friendship Timeline
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Kylie Jenner Says She ‘Always’ Makes Out With Stassie Karanikolaou: ‘A Lot of Best Girlfriends Do That’
Kylie Jenner Addresses Rumors She Hooked Up With Stassie Karanikolaou
Stassie Karanikolaou celebrates turning 26 with her BFF Kylie Jenner her loved ones
Kylie Jenner cuddles up to best friend Stassie Karanikolaou as she celebrates pal's 26th birthday
Kylie Jenner's lookalike BFF Stassie Karanikolaou parades her slimmed down look at Cannes gala
Kylie Jenner's BFF Stassie Karanikolaou reveals her beach day beauty secrets
Kylie Jenner's BFF Stassie Karanikolaou flaunts VERY tiny waist in a skintight workout
Bikini Queen! See Stassie Karanikolaou’s Best Bathing Suit Photos Over the Years
Stassie Karanikolaou’s Swim Collab With Cupshe Will Make You Feel ‘Confident’
Stassie Karanikolaou's Swimsuit Collab Delivers Viral Fashion Moments
Kylie Jenner’s BFFs Stassie Karanikolaou and Victoria Villarroel Rock Thong Bikinis in Mexico
Kylie Jenner Kisses BFF Stassie Karanikolaou on Valentine's Day Amid Break From Travis Scott
Kylie Jenner's BFF Stassie Karanikolaou puts on busty display in a tank top during MTV Cribs shoot
Stassie Karanikolaou shares new snaps with BFF Kylie Jenner and boyfriend Jaden Hossler
