Taylor Swift and Selena Gomez ''always'' talk about collaborating.

The 'Blank Space' hitmaker and the 'Heart Wants What It Wants' singer are best pals and are reportedly keen on working in the studio together on a joint track.

A source said: ''Selena and Taylor talk about music all the time. It wouldn't surprise me if they collaborate on something soon.

''But when they do decide to work on something together, they want it to be out of this world, and be about friendship, boys, and overcoming anything. They always talk about this when they see each other!''

The pair are said to have even sat down together to discuss songwriting, with Selena taking musical inspiration from the 25-year-old star.

An insider told HollywoodLife.com: ''Taylor has sat down with Selena a few times to talk about the writing process. Despite all her success, she never comes off as arrogant or like a know-it-all. She just suggested a few things that helped her along the way, and now Selena has incorporated them into her music.

''Selena's written a lot more songs based on her personal experience and heartbreaks. It was Taylor that she drew inspiration from in that sense, who told her that's something she should really focus on, because it's what young people, especially young female fans, can relate to.''