Lady Gaga and Taylor Kinney's careers have been blamed for their split.
The couple - who got engaged in February 2015 - recently ended their five-year romance and insiders believe their conflicting schedules caused the break-up..A source told People magazine:
"Their work kept them apart a lot.Chicago Fire keeps him in Chicago and her work is almost always elsewhere."
Last week, on Taylor's 35th birthday, Gaga, 30, was seen without her engagement ring while she was out and about in Malibu.
Taylor and Gaga met on the set of her 'You and I' video and she previously revealed how they kept their long-distance romance alive.
"We don't have any rules about calling each other at certain times ... We'll go days at a time without talking and then we'll talk every day," she said. "He's on his journey and I'm on mine and we're gypsies. And then when we're together, we're really in love and that's it.
