The Backstreet Boys are back and their charisma is still there.

One of the most famous boy bands in the 1990s reunited once more and performed together at the Balmain x H&M's celebration. The audience of the star-studded event were surprised by the entertaining performance of the pop stars.

The unannounced performance of the Backstreet Boys made everyone sing along. The group sand their hit songs 'Everybody (Backstreet's Back)', 'Larger Than Life,' and 'I Want It That Way.'

Kendall Jenner and Gigi Hadid who were present at the fashion sang along with the boy band. The Backstreet Boys proved that their talents did not go away despite their age when the audiences started recording their surprise performance.

Members of band Howie Dorough, Nick Carter, A. J. McLean, Brian Littrell and Kevin Richardson showed off their fancy dance moves and even hang along with the crowd while singing their song 'I Want It That Way'.

Olivier Rousteing, the creative director of Balmain was the one who organized the performance and admits that he is a big fan of the boy band.

Footages of their performance started circulating all over the internet indicating that Backstreet Boys is still a powerful group.

English fashion model Alexa Chung who was also at the Balmain x H&M's celebration admitted that she still admires the band. She stated that she might still have 'knickers' from the boy band era.

"They're really old. Embarrassing old. I found 'Beauty and the Beast' knickers that I must've gotten as a child. I haven't worn them obviously, but they were still in my wardrobe," the model stated.

Meanwhile, Backstreet Boys and the famous 90s girl group 'Spice Girls' are currently discussing about a possible reunion tour.

"The Spice Girls tour has been this idea bouncing around for the past year and a half, and it's something we're still talking about," AJ McClean revealed.