MBLAQ

MBLAQ, (엠블랙, an acronym for Music Boys Live in Absolute Quality) is a South Korean quintet boy band created by Korean pop R&B singer Rain under his label J.Tune Entertainment. The members include Yang Seung Ho (양승호). Jung Byung Hee (정병희) Lee Changsun (이창선) Park Sang Hyun (박상현) Bang Cheol Yong (방철용). The group debuted in October 9, 2009 at Rain's Legend of Rainism concert. On October 14, 2009 the group released their debut single album, "Just BLAQ", which topped various on-line and off-line music charts in South Korea.[1] The group then released their second single Y in May 18, 2010.

 (more info on http://en.wikipedia.org/wiki/MBLAQ)

I just like the first ten seconds where I think features Rain's yummy back. I think.