The singer won't be telling all about her romance with Justin

Selena Gomez has revealed that she’s been working with good pal Taylor Swift on a break-up song about Justin Bieber.

Taylor, 23, gave Selena tips on how to pen the perfect heartbreak tune but the former Disney star is being careful not to reveal too much about her relationship with Justin, 19.

‘She obviously has her own technique to it that works so well with her and she just knows how to make hits,’ Selena, 20, tells Ellen DeGeneres.

‘I like to keep things a little more internal and that’s just because I’m trying to dabble into it a little bit more and she’s helped me actually, giving me great advice on how to do that.’

Despite wanting to keep things private, Selena – who split from Justin in January – raised eyebrows last month when she seemingly made a dig at her ex in a YouTube video.

The brunette and her friends performed a routine to dance track Everybody Knows (Your Boyfriend is a Douchebag).

Selena wore a hoodie over her head and low-slung trousers in the clip – an outfit more commonly seen on Justin.

See Selena Gomez dance to Everybody Knows (Your Boyfriend is a Douchebag).

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Anna Duff