Unlike the Amy Winehouse song of the same name, this is a metaphorical song. Rehab means we have to get over the guy. So we talk about checking ourselves into rehab, and we compare the guy to a disease or an addiction. >>
This was written by Justin Timberlake, Timbaland and Hannon Lane. Timbaland also produced the song and contributed backing vocals with Timberlake on the tune’s bridge.