Singer Ailee sang the 2014 Brazil World Cup Red Devils' official cheer song "Fighting Spirit".

Ailee participated in the Red Devils' fifth We are the Reds album, cheering the Korean soccer team on through her music.

Ailee staged a powerful and passionate performance in the "D-100 Korea Cheer Battle" on March 5, drawing enthusiastic response from citizens.

Attention is drawn to whether Ailee's "Fighting Spirit" will be the next "Oh Pilseung Korea", sung by the YB Band. "Fighting Spirit" features Ailee's powerful voice and adds heat to the cheer.

Red Devils' official cheer songs are also sung by nine other artist groups including DICKPUNKS, AOA, Trans Fixion, Tiny-G, and Minah of Girl's Day.

Meanwhile, the official cheer songs will be heard in the street cheer events during the June Brazil World Cup games.