JUSTIN BIEBER's on/off girlfriend SELENA GOMEZ appears to have dealt a blow to the couple's relationship by performing a rendition of JUSTIN TIMBERLAKE's bitter break-up anthem CRY ME A RIVER at a show in New York on Saturday night (19Jan13)

Introducing the cover by stating it "definitely speaks to me", Selena delivered a pitch-perfect acoustic version of the track during a performance at a UNICEF charity concert with her band The Scene.

Ironically, Bieber performed the song back in November (12), when reports the couple had split first started swirling.

Gomez's cover featured a lyric switch, where she sang, "Boy I refuse, you must got me confused with some other girl," and she smirked as she sang "the damage is done, so I guess I'll be leaving".

Looking all good-girl in a white shirt and matching flower headband, the singer giggled at the end of the track and said, "OK, that's enough of that."

During her UNICEF gig, Gomez also name checked her unlucky-in-love best pal Taylor Swift, and performed her current hit Trouble.