The vocalist of Vertex (band) is older than another singer. This other singer was once a member of the group Wonder Girls.
Min Sun-ye (Korean: , born August 12, 1989), also known as Sunye or Sun (stylized as SunYe), is a South Korean missionary and former singer and actress (on hiatus). 
Stephen Eric Pearcy (born July 3, 1956), known as Stephen Pearcy, is an American musician. 
 Members Sunye and Sohee officially left the group in 2015, while Hyuna left in late 2007. 
Vertex was a band formed in 1995 featuring singer Stephen Pearcy (Ratt, Arcade, Vicious Delite, Nitronic), guitarist Al Pitrelli (Danger Danger, Hotshot, Alice Cooper, Asia, Savatage, Megadeth, Trans-Siberian Orchestra), and drummer Hiro Kuretani (WXXI, Trancentral Station). 
