Many have questioned whether the split has anything to do with a potential romance between Gaga and Cooper.
Though Cooper "really made an effort" with Shayk as the award season heated up, "he was spending all of his time with Lady Gaga", noted the insider.
Earlier this week, Grammy-winning singer Gaga performed at the Park MGM in Las Vegas.
According to Britain's The Sun newspaper, as Gaga took to the stage in Las Vegas on Saturday, she was heckled by calls from the audience asking where Bradley was. "You know why? Because I thought they were "Shallow".
Fans have long speculated about the chemistry between Lady Gaga and Bradley Cooper.
Speculation of a romance formed nearly immediately after the performance. "Yes, people saw love and-guess what-that's what we wanted you to see".
Full Trailer for Disney Animation's Sequel 'Frozen II' with Elsa & Anna
The Frozen 2 Teaser Trailer is Here! Frozen 2 poster comes on the heels of a new trailer lined up for release. Brown ( This is Us ) and Evan Rachel Wood ( Westworld ). "In 'Frozen 2 , ' she must hope they are enough".
But people are drawing connections between the choice of song and her final words.
The newly single supermodel has been on the move since her breakup, and has been sharing a few photos along the way. The supermodel and the Oscar victor started dating in 2015, and welcomed their daughter Lea De Seine in March 2017.
'They want to stay together for their daughter, but neither of them are very happy'.
The source goes on to say that it's an extremely hard situation for them because, 'they have a lot invested'.
The duet earned the pair a standing ovation with their stunning rendition of the song, but fans began speculating as to whether there was anything romantic between Gaga and Bradley - despite the fact that Irina Shayk, the mother of Bradley's two-year-old daughter Lea, was in the front row.
Bradley and Irina are said to be working out the terms of their split, with the actor likely to let Irina keep his Los Angeles home as "her place in the West Village is too small at this point for a child".