Between them, they dominated the charts during three separate decades, selling hundreds of millions of records.
So when it came to forming a supergroup, it was a natural choice for New Kids On The Block (NKOTB) to team up with Backstreet Boys.
Amaru Don TV are offering a competition for all die hard fans. If you would like a chance to win a pair of tickets to see the legendary groups at the London O2 Arena 29th April, answer the question below.
What are the names of each of the individual group members of NKOTB & Backstreet Boys?
Email your answers to firstname.lastname@example.org with your name & contact number. Deadline is for the competition is Wednesday 11th April.