Demi Lovato vs Selena Gomez Beef: 'Neon Lights' Singer Talks Twitter Feud With Justin Bieber's Girlfriend [Watch Video]

On Bravo's Watch What Happens Live, pop singer Demi Lovato is put under the hot seat by host Andy Cohen. Everyone wants to know why the Neon Lights songstress had a falling out with her former BFF Selena Gomez, leading them to unfollow each other on Twitter. 

Both Texas natives had met while filming Barney & Friends back in 2002. Their close relationship hit a bumpy ride as rumors swirled over a feud about Justin Bieber. As their on-and-off relationship continued to be hounded by tabloids, there was a casualty in the whole debacle, leading the close friends to say farewell to each other.

With Jessica Alba (Sin City: A Dame To Kill For) sitting beside her, the Camp Rock actress had to answer Cohen's straight-to-the-point 3 questions. First off, the Skyscraper singer had to decide who she would kill, marry, or shag amongst Joe Jonas, Simon Cowell, and Justin Bieber. The recording artist jokingly teased she would "kill" all three.

Then the X-Factor judge passed on the second question, keeping her lips sealed about a scandalous Disney star. But what she couldn't hide from was the interrogation about unfollowing the Come & Get It singer on Twitter.

Lovato hesitates at first but answers, "I think it's just one of those things where people change and people grow apart."

Watch the interview here:

E! reports that Bieber and Gomez are back together again, sharing a deleted photo on Instagram.

Demi Lovato doesn't hold back as she answers straight-forward about why she unfollowed Selena Gomez on Twitter. Readers, what did you think of Lovato's response?