Gomez, 20, said she has gone through a lot on the personal front for the past few months, reported Daily Mail.
The Disney starlet took to the stage in New York to belt out Justin Timberlake's classic 'Cry Me A River' and said that the song definitely speaks to her.
Before she began singing, Gomez said, "I've been through a lot the past few months. It's been weird and sad and cool. This song definitely speaks to me."
Wearing a bohemian-style white dress and daisies in her hair for the performance, Gomez did not specifically take Bieber's name.
The couple broke up shortly after holidaying in Mexico, where they had planned to ring in the New Year together. They got into a huge argument on December 30 last year, after she reportedly found text messages from other girls on his phone.