Aly Michalka’s Hair At ‘Grown Ups 2’ — Goes To The Dark Side Aly first went dark at the beginning of 2013, but her mane was a lighter brown with blonde highlights in the front.

At left is Aguilera in 1999. At right, check out Aly Michalka (the blond) from the CW’s cheerleader drama “Hellcats.” Light blond wavy-curly hair? Check. Midriff-baring logo top? Check.

Pop sister duo Aly & AJ Michalka talk exclusively with PEOPLE on their partnership with Bobbi Brown Cosmetics, embracing natural beauty and their essential tour makeup products ...

The 14 products that Aly and AJ Michalka can’t live without, including EO hand sanitizer, Perrier in guava, Honest Beauty mascara, Apolis market totes, NSF plain white tees, Levi’s 501s, Vans ...

It's difficult to tear your eyes away from medal-winning Olympic Gymnast Aly Raisman. The leader of the fierce Final Five is known for wearing her hair in the tightest topknot when she performs ...

The Best & Worst Dressed Artists of the Week: Aly and AJ Michalka & Lily Collins Check out who is rocking killer threads and who needs to put their stylist on (permanent?) timeout this week.