Demi Lovato All Smiles At Press Conference By Lisa Hiser - January 16, 2009 0 FacebookTwitterPinterestTumblr -Demi Lovato, along with co-stars Tiffany Thornton and Sterling Knight, attended Day 10 of the Winter TCA Tour. The stars were on hand to talk to the press about the upcoming show, “Sonny With A Chance” which debuts in February.