All Songs: X1
 | X1 - Stand Up (Intro) Album: QUANTUM LEAP Hits: 8373 |
 | X1 - FLASH Album: QUANTUM LEAP Hits: 17024 |
 | X1 - 웃을 때 제일 예뻐 (Like always) Album: QUANTUM LEAP Hits: 12932 |
 | X1 - 괜찮아요 (I`m here for you) Album: QUANTUM LEAP Hits: 12501 |
 | X1 - U GOT IT (X1 Ver.) Album: QUANTUM LEAP Hits: 10372 |
 | X1 - MOVE (Prod. by ZICO) (X1 Ver.) Album: QUANTUM LEAP Hits: 8877 |