Christina Perri: 'Jar of Hearts changed life'
The singer debuted the song on So You Think You Can Dance in June 2010 before she had even secured a record deal and revealed that the performance single-handedly started her career.
"When my song was on... So You Think You Can Dance my life changed that night, like, it was very fast," she told MTV News.
"It's 2011, and that was last year [and] with the Internet everything [it's all very] 'right now'. So when the song aired on the show, by midnight, I never had to go back to waitressing again.
Perri - who will release her debut album Lovestrong on May 10 - went on to say that she is aware of how lucky she is to be able to pursue her dream.
"I just existed; I didn't exist and then I did. I flew to New York City, I signed a record deal like, boom, boom, boom, boom. And it hasn't stopped, which is a good thing," she explained.
"I'm trying to stay grounded and focus and keep doing what I'm doing every day, but it's been this magical thing where, like, I don't have to wake up and cover my tattoos and be a waitress. All the hard work... ended up really working out. I'm grateful."
Watch Christina Perri's video for 'Jar of Hearts' below: