K-stars go all out for their World Cup boys

Korean idols are getting in on the World Cup action big time, with concerts, Instagram photos and music videos. 

Ahead of his countrymen's first World Cup match against Russia on Wednesday (June 18), rapper Psy put on a show in - where else - Gangnam, Seoul, for an estimated 20,000 people who had shown up to watch the game, reported the Korea Herald. 

“I will cheer with the loudest voice in the world. ... If we get tired, we lose. If we go crazy, we win!” said Psy, who was decked out in red, the signature colour of the Red Devils, the name of the biggest supporter group for South Korea's national team.

Psy performs during a public screening before the 2014 World Cup Group H soccer match between South Korea and Russia, in Seoul June 18, 2014.

PHOTO: Reuters

A World Cup album, We Are The Reds, has also been released with 14 cheer songs from stars like Ailee, AoA, Girl's Day's Minah and more. 

Ailee - Fighting Spirit

Wa$$up - Fire

Super Junior member Kangin posted a picture of himself on Instagram with the caption: "Korea fighting a lot I will watch my hyungs Bae Sung Jae and Hae Sol Lo let's cheer together" 

Super Junior member Kangin posted a picture of himself in support of the Korea team at the World Cup 2014

Girl's Day's Hyeri and B.A.P's Bang Yong Guk also posted Instagram pictures in support of the South Korean team, reported Kpopstarz. 

Girl's Day's Hyeri posted a picture of support for team Korea at the World Cup on her Instagram

Girl's Day's Hyeri posted a picture on her Instagram with a message of support for team Korea at World Cup 2014, ending off with "Fighting!"

Sources: Kpopstarz, MTVK.com, Korea Herald