Baby U!

is a song released by the South Korean boy band MBLAQ.

It is the group's second Japanese single and it was released on October 26, 2011, via Sony Music Records Japan.

[3][4] As part of their promotions, MBLAQ travelled to Nagoya on the 28th, Osaka on the 29th, and Tokyo on the 30th to celebrate the release of their new single.

On October 30, 1500, fans were chosen by a lottery among the 12,500 people who gathered at the venue to join the LIVE performance and Great Bingo Tournament.

On the final day, 23,000 fans gathered for a special 'High five' event, as well as performances.