"Again & Again" (Korean: 어게인 & 어게인; RR: Eogein & eogein) is a Korean song by South Korean boy band 2PM. It is the title track of the group's single album 2:00PM Time for Change. It premiered digitally on April 16, 2009 and was released as a CD single in South Korea on April 23, 2009, via JYP Entertainment. The release is supported by the B-side tracks "What Time Is It Now?", "I Hate You", and "Maybe She'll Come Back".
The song was 2PM's first number-one single and has won the group several accolades, including the 2009 MAMA Award for Artist of the Year. It was also included in 2PM's first studio album, 01:59PM (2009), and a re-recorded version was included in 2PM's compilation album 2PM Member's Selection (2012).