PARK CITY, UT - MARCH 14: Lady Gaga and Taylor Kinney attend Operation Smile's 4th Annual Celebrity Ski & Smile Challenge VIP
Kristin Murphy/Getty Images for Operation Smile

Lady Gaga and Taylor Kinney have reportedly broken up, say TMZ sources. The couple, who met on the set of Gaga's 2011 video for "Yoü & I," have been spending a lot of time apart, and the singer has been seen without her engagement ring.

The Chicago Fire star proposed to Gaga last Valentine's Day, when he presented her with a large heart-shaped diamond.

TMZ claims that the power couple parted ways earlier this month. Gaga is currently in Mexico, where she recently sang in a foster care home. She was sans Kinney and sans ring.

Gaga is hard at work on her fifth album, which may include some work with Tame Impala's Kevin Parker and Mark Ronson. Meanwhile, Kinney is prepping for the Season 5 premiere of his NBC show in October.