Selena Gomez Break-Up Song; Talks Justin Bieber Split: 'It's Been Sad' [VIDEOS]

Following her split with Justin Bieber, Selena Gomez took to singing well-known break up anthems at a concert on Saturday, Jan. 19.

The former Disney star, 20, headlined the third annual UNICEF charity concert at the Best Buy Theater in New York City and aside from performing her hits "Round and Round" and "A Year Without Rain," she also decided to sing a cover of Justin Timberlake's "Cry Me a River" and Taylor Swift's "I Knew You Were Trouble."

"I've been through a lot the last couple of months. It's been sad and cool, but interesting. This song definitely speaks to me." she said to the crowd about Timberlake's song, according to HollywoodLife. Gomez also changed up the song's lyrics so that it would reflect a woman's perspective. 

She ended the tune with a laugh and then said, "Well, enough of that!"

Timberlake's 2002 song was reportedly inspired by his failed relationship with Britney Spears. Bieber sang an acoustic version of the song at a concert in Boston shortly after the couple's first time off from each other in November 2012. 

Before singing Swift's song, Gomez told the crowd she wanted to choose a song that her "best friend in the entire world" wrote. "If you've ever felt pain, you know this one," she said before singing.

Gomez returned to the stage in her first show in over a year. Her new film "Spring Breakers" recently premiered and her new album will be released later in 2013. She told the crowd on Jan. 19, "it feels so good to be back."

"I'm so excited to be recording new music, which I'm excited to play...but not today," she said.

Watch below videos of Gomez performing at the UNICEF concert.