What was Demi Lovato number 1 song?

Demi Lovato's number one song on the Billboard Hot 100 chart is "Stone Cold," which peaked at the number 1 position in 2016. However, it is important to note that while "Stone Cold" received critical acclaim, Lovato has not had a number one hit on the Billboard Hot 100 chart itself. Her most successful songs, like "Skyscraper" and "Sorry Not Sorry," have reached high positions but did not achieve the top spot.