- Digital Single
- Wae Ireoni (왜 이러니; Why Are You Like This?)
- Wae Ireoni (왜 이러니)
"Wae Ireoni" is T-ara's fourth digital single. The song was released as a teaser for their second album Temptastic, and features the mini-album's title on the single' cover art (which was later used as the mini-album's back cover). The single was their first release as a 7-member group after Hwa Young joined them. The song reached #155 on the Gaon 2010 digital yearly charts with 1,058,623 copies sold.
- Wae Ireoni
- Found on "Wae Ireoni" single as track #1 and onTemptastic mini-album as track #2. This is the standard version set to the music video.
- Wae Ireoni (Remix ver.)
- Found on "John Travolta Wanna Be" single as track #4. This is a remixed version.