Salma HayekPenélope CruzSofía Vergara
OK, you should have nailed this one. That's Monica Cruz, lookalike little sister of Oscar winner Penélope!
Rachel McAdamsKate WinsletGwen Stefani
That's Kayleen McAdams — Rachel's lil' sis who's a celebrity make-up artist! They almost look like twins, no?
Katy PerryFelicity JonesSandra Bullock
That's Gesine Bullock-Prado, little sister of Sandra. She used to be a producer but followed her passion and is now a pastry chef!
Blake LivelyJennifer LawrenceNatalie Portman
That's Blake Lively's big sister, Robyn! She was the original Teen Witch. On the right is eldest sister Lori who's an actress as well.
Cara DelevingneJanuary JonesKate Moss
That's Lottie (full name: Charlotte), baby sister of supermodel Kate Moss. Lottie recently followed Kate into the modeling world, making the Moss family the lottery winner of gorgeous genes.
Naomi WattsJulia RobertsMadonna
That's Lisa Roberts Gillan, older sis of Julia Roberts. You might recognize Lisa from flicks like Runaway Bride, Maid in Manhattan, and Raising Helen.
Jennifer LopezChelsea HandlerSelena Gomez
That's Lynda Lopez — a journalist who just so happens to have grown up on the same block as Ms. Jennifer Lopez.
Thandie NewtonGugu Mbatha-RawRashida Jones
That's Kidada Jones, older sister of actress Rashida! Kidada is a jewelry designer who was engaged to Tupac at the time of his death.
Emily BluntAmanda SeyfriedEva Green
That's Felicity Blunt, sister of Emily Blunt! Did you know that Emily introduced Felicity to her Devil Wears Prada co-star Stanley Tucci and the two are now MARRIED?! Thanks sis.