Justin Bieber, Zayn Malik planning collaborationLos Angeles, March 27 (AZINS) Singers Justin Bieber and Zayn Malik are reportedly planning to collaborate for a new single.

The rumours of them working together started coming up after Bieber retweeted a link of Malik's new single from his upcoming album featuring rapper PARTYNEXTDOOR, reports aceshowbiz.com.

"Justin has been really complimentary of Zayn's new music and there have been tentative discussions about them working on something together," a source told The Sun newspaper.

The source said that the two are becoming friends.

"They are in touch and chatting about all sorts and getting on like a house on fire. Justin even re-tweeted a link to Zayn's single on his Twitter which he doesn't just do for anyone," the source said.

"It would be a huge collaboration if it happened so watch this space," the source added.