The former couple is sparking speculation of a romance rekindling after reuniting at a 2015 Met Gala after party last night in NYC.
Following the annual red carpet event, the 21-year-old "Boyfriend" singer and the 22-year-old brunette beauty hung out at Rihanna's bash at Up & Down. A source tells E! News that even though the exes spent a lot of time in the same room together hanging out with pals like Kylie Jenner and Tyga, Bieb...
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