"Tell Me" is a song by South Korean girl group Wonder Girls, from their debut album, The Wonder Years (2007). It was released as the lead single from the album on September 13, 2007, through JYP Entertainment. Written and produced by Park Jin-young, the song samples Stacey Q's "Two of Hearts" (1986) written by John Mitchell. "Tell Me ", which features Yubin's self-written rap verse, was added as a B-side to their second physical single "So Hot" in May 2008.

Wonder Girls (Korean: 원더걸스) was a South Korean girl group formed by JYP Entertainment. The group debuted in February 2007 with the single "Irony" and 5 members: Yeeun, Sunye, Sunmi, Hyuna and Sohee. After Hyuna's departure in July, Yubin was added into the group prior to the release of their debut studio album, The Wonder Years (2007). The album spawned the hit single "Tell Me", which topped various South Korean music charts.