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March 12, 2015
APink debut with their 1st mini album Seven Spring of APink. Their album released on April 19th 2011 and for the first time promotion their title track I Don't Know on M!Count Down on April 21th 2011.
Seven Spring of APink cosist 4 list of song
1. Boo
2. I Don't Know
3. It Girl
4. Whislist
Park Chorong
Jung Eunji
Son Naeun
Yokyung
Oh Hayoung
