Bad Idea (Ariana Grande song)

"Bad Idea" (stylized in lowercase) is a song performed by the American singer Ariana Grande from her fifth studio album Thank U, Next (2019). The track was written by Grande, Peter Svensson, Savan Kotecha, and its producers Max Martin and Ilya Salmanzadeh. It is an EDM and trap song in which Grande talks about using someone to recover from a previous relationship.

Some critics praised the track's composition, while others found it too similar to Gotye and Kimbra's "Somebody That I Used to Know". Following the release of Thank U, Next, "Bad Idea" reached the top ten in Greece, Hungary, Lithuania and Slovakia. It peaked in the top 30 in Australia, Canada, Denmark, Ireland, Portugal, Singapore, and the United States. Grande included the track on the set list of her Sweetener World Tour in 2019. That year, she performed it at the Coachella Valley Music and Arts Festival and Lollapalooza.