Justin Bieber Takes High School Student to Billboard Music Awards

When 18-year-old Cady Eimer asked the one and only Justin Bieber to go to prom with her, he had to turn her down due to prior obligations, but she got her own fairytale Sunday night when Bieber brought the high school student as his date to the Billboard Music Awards. See the cute way he asked her to join him! Plus, Katy Perry brought her 91-year-old grandmother to the star-studded event. Check out Grandma's blinged-out cane! And, also on Sunday night Marc Anthony, 43, stepped out with his 24-year-old girlfriend, Shannon De Lima, at a hospital fundraiser in Los Angeles, California.

Check back weekdays at 12 p.m. PT

• Follow omg! NOW on Twitter

• Click here for Kristen's bargain style fashion

• Become a fan of omg! NOW on Facebook

More Celebrity Features on Yahoo!:

• Christina Aguilera vs. Kim Kardashian — Fashion Faceoff!

• Bono Becomes Richest Rock Star in the World — Thanks to Facebook

• 7 Drastic TV Star Transformations (Photos)