- Davichi & T-ara
- Uri Saranghaetjanha (우리 사랑했잖아; We Were in Love)
- Uri Saranghaetjanha (우리 사랑했잖아)
"Uri Saranghaetjanha" is Davichi's and T-ara's first collaboration digital single. Although the single was credited to T-ara only So Yeon, Ji Yeon, Hyo Min and Hwa Young participated. This was their first joint single, however the two groups collaborated in the past with SeeYa for the release of "Yeoseong Shidae / Yeongwonhan Sarang" and "Wonder Woman" singles. Although a music video was produced for the song, it was also featured on T-ara "Lovey-Dovey" music video (Drama version).