The trio, the original Sugababes who have now reformed under the name Mutya Keisha Siobhan, took to the stage at a party ringing in 2013.
The event, which saw the trio belting out their single Freak Like Me and Rihanna's hit song Diamonds, marked the first time they had performed on stage together for around 10 years.
Mutya tweeted: "We promised every1 something frm us by new yrs and we gave it hope u all enjoyed last nite who ever was there an enjoyin it on youtube xxxxx"
Mutya, Keisha and Siobhan founded the girl band together in 1998.
Siobhan quit the group during a tour in Japan in 2001, and Heidi Range replaced her later that year. Mutya left in 2005 and was replaced by Amelle Berrabah. Keisha quit in 2009 and was replaced by former UK Eurovision entrant Jade Ewen.
Last year the three original members announced they were getting back together.