Demi Lovato and Luke Rockhold Make Things Instagram Official After Nick Jonas Crashes Their UFC Fight Night

Don't have a heart attack Lovatics, but Demi Lovato appears to have experienced quite the special weekend.

One day after the "Stone Cold" singer stepped out holding hands with Luke Rockhold outside Madison Square Garden, the famous pair headed to Instagram to post their first pictures together.

Luke kicked things off early Sunday evening when he shared a photo of himself next to Demi at UFC 205.

Soon after, Demi posted (then deleted) a photo of herself boxing with an unidentifiable individual. Could he be the one and only Luke? Whoever it is, her caption stated she was "so happy" before adding a pink heart.

She later posted the same photo as Luke with the message, "About last night…