Eagle-eyed fans noticed that at one point, the star tilts toward the camera to showcase the front of her oversize gray t-shirt, which features singer Bruno Mars. Related: Joaquin Phoenix Says Lady ...

In June, Bruno Mars said ... something with Mars. On social media today, Gaga shared a video (here), a 25-second clip of herself playing piano while wearing a Mars shirt, which she seemed ...

Lady Gaga and Bruno Mars ... Gaga and Mars first teased their one-off single in a series of social media posts earlier this week, with Mars sharing a post in which he wore a shirt with Gaga's ...

They've interacted in the comment section of his IG, she posted a video wearing a Bruno Mars shirt, while he posted a photo of himself wearing a Lady Gaga tee. But could we be getting a live ...