Boy band the Backstreet Boys - now all grown men - on Monday marked their 20th anniversary and their upcoming world tour by getting a star on the Hollywood Walk of Fame.

"Backstreet is Back ... and we aren't going anywhere," Nick Carter, 33, told fans as all five members of the 1990s band gathered to unveil their star - located right next to another popular boy band, Boyz II Men.

The close harmony singers were visibly emotional as they thanked their families and fans for their support over the years.

"What an honour it is," said Kevin Richardson, 40, holding back tears. "What a beautiful day. What another beautiful way to celebrate 20 years together."

Formed in 1993 in Florida, the Backstreet Boys went on to sell more than 130 million albums worldwide and score hits like "I Want It That Way," and "Shape of My Heart."

The other members of the group are Brian Littrell, AJ McLean and Howie Dorough.

After several hiatuses in the 2000s and the departure of Richardson, the five original members officially got back together last year and will embark on a world tour in May, starting in China.

Backstreet Boys are also due to release a new album this summer, and a music documentary in 2014. – Reuters