Demi Lovato opens up about 'unfollowing' Selena Gomez on Twitter

Demi Lovato recently revealed why she 'unfollowed' her former BFF Selena Gomez on Twitter, while her appearance on the Watch What Happens Live show.

The 21-year-old artist said that it was just one of those things where people change and people grow apart, the Mirror reported.

When WWHL host Andy Cohen asked who the 'Warrior' singer would shag, marry or kill among Joe Jonas, Justin Bieber and Simon Cowell; Lovato replied she would kill all of them except for Jonas as they are good friends.