"Do I" is a song co-written and recorded by American country music artist Luke Bryan. It was released in May 2009 as the lead-off single from his album Doin' My Thing. Bryan co-wrote the song with Dave Haywood and Charles Kelley of the group Lady Antebellum, whose co-lead singer Hillary Scott is featured on background vocals. "Do I" is about a couple questioning the status of their relationship. An accompanying music video for the song, directed by Shaun Silva, is set in a high rise condominium where Bryan contemplates his relationship with his girlfriend.