i want to ask is it right they have song her name"what's up?"

cnblue dont have a song with a Название "What's Up". but from what i know what's up song is sang by four blondes and the song were sang by seohyun on wgm, while she's learning гитара from Yonghwa wh.Yonghwa asked her to practiced that song:).but cnblue dont have a song called "what's up" : )