Singing through the heartache?
During a Boston concert on Saturday night, Justin Bieber summoned another world-famous Justin -- Timberlake -- in a potential nod to his fresh split with Selena Gomez.Armed with just a guitar, with another band member strumming as well, the 18-year-old singer crooned a stripped-down, acoustic version of "Cry Me a River," Justin Timberlake's smash 2002 ballad inspired by his own split from Britney Spears.
PHOTOS: Justin & SeLena's beach PDA
The Canadian-born sensation left it vague when asked about the split with Gomez, 20, during a radio interview...
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