Miley Cyrus & Liam Hemsworth: 'Happy' Friday!

Miley Cyrus carries new pup Happy in her arms as she leaves the pet store on Friday afternoon (May 11) in Los Angeles.

Joined by boyfriend Liam Hemsworth, the two picked up some more supplies for their growing canine family. The two already share their home with Floyd and Ziggy.

PHOTOS: Check out the latest pics of Miley Cyrus

It was just announced that Miley will be presenting at the 2012 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas on Sunday, May 20th.

FYI: Liam is wearing his fave pair of Vans.