Justin Bieber spent last night with producer Timbaland, working on new tracks for Bieber's second album.

The pair kept fans up to date with all their activity via Twitter with Timbaland saying, "yo @justinbieber played me some of his joints last nite, craziee. the dude is super talented & our work ethnics are just alike. #hitsondeck"

We think he meant 'ethics', at least we hope he did.

Meanwhile, Justin was Tweeting too and told his millions of followers that: "in the studio with @timbaland and the crew. #creating"

Justin also posted pictures of himself skating with Lil Wayne. Could a guest spot be in the offing?