"Number Nine" is a song by South Korean girl group T-ara, from their eighth extended play Again.

[3] On 15 September, Core Contents Media revealed that T-ara will make their comeback on 10 October 2013.

"T-ara Party Non-Stop Remix" by DJ Takao Fukushima is composed of ten songs spanning 45 minutes: "Bo Peep Bo Peep", "Yayaya", "Lovey-Dovey", "Roly-Poly", "Waeroni", "Bye Bye", "Like The First Time", "Target", "Bunny Style!"

All editions of the single come with a trading card with a serial code, chosen randomly out of seven types.

[6] The first time the song was revealed was on 6 October 2013 when performed at "Hallyu Dream Concert".

[10] SBS PopAsia named the song number 7 in their list of 9 best T-ara singles.

6 on its Best T-ARA songs to date praising the "perfect fusion of both the EDM sound that defined the era and the softer dance-pop that punctuated their earlier music".