Lady Gaga Gets Her Plastic Ono On & More! [Celebrity Twitterverse]

Frankie Muniz announces a return to acting (get excited about Shia LaBeouf and Frankie box office wars), Melissa Joan Hart and Kelly Osbourne spend some time together, Snooki gives the ladies some advice, and more in the gallery.

Listen to a new song from Demi Lovato, after the jump.

Check my Work of Art music vid & plz watch #SWACSo Random Halloween special w/@the_real_shaq on 10/17!