A feud seems to have broken out between Demi Lovato and gossip blogger Perez Hilton on Twitter, but the reasons behind it are pretty cryptic. Here's what we understand, though.On Monday, Lovato tweeted at Hilton, "Do something with your life," though the tweet has since been deleted, according to PopCrush . When someone saw the tweet and asked what happened, Hilton described a confusing exchanged between him and Lovato.