"Fallin' (Adrenaline)", originally titled "Fallin'", is a song by American boy band Why Don't We. It was released on September 29, 2020, as the lead single from their second studio album The Good Times and the Bad Ones. It was the first song that the band released after their eight-month hiatus that began in early 2020. The song debuted and peaked at number 37 on the US Billboard Hot 100 chart, becoming the band's first and highest entry. The song samples "Black Skinhead" by Kanye West, from his 2013 album, Yeezus.