Justin Bieber Hangs Out With An Older Woman & More! [Celebrity Twitterverse]

Selena Gomez and Katie Cassidy celebrate the premiere of Monte Carlo, Ryan Seacrest and LMFAO party hard over the radio, Usher shows us how he keeps his body looking so good, and Justin Bieber visits the ladies of The View.

Check out all the Twitter photos and pics by launching the gallery!