Justin Bieber may have a beef with The Weeknd but he also had some beef at Mastro's Steakhouse Monday afternoon. That's right -- he snarfed down a bit T-bone at 4 in the afternoon, which is a little weird. But maybe he's "beefing" up to take on Selena Gomez's new boyfriend!

Biebs recently said he hates The Weeknd's music -- seems like he just flat out hates The Weeknd. And if his jacket is any sign, he's a little Looney Tunes over the whole situation (what's up with Tweety and the Taz?!).

Meanwhile, Justin isn't all bad blood -- he's doing a super good deed in auctioning his blue Ferrari from West Coast Customs for charity. He hasn't decided which good cause yet, but HollywoodLife reports it could go to either Pencils of Promise, City of Hope or Children’s Miracle Network. Bieber also threw in tickets to a US show on his tour and a pair of his Calvins. The car, valued at between $250,000 and $300K, ended up going for $434,500 at the Barrett-Jackson in auto auction in Arizona. Wow!