"The Big Reunion" is a British reality television series that first aired in 2013. The show focuses on popular music groups from the 1990s and early 2000s, reuniting them for a special performance. It features bands like Atomic Kitten, B*Witched, and 5ive, showcasing their journey as they prepare for a comeback tour. The series highlights the personal stories of the band members, exploring their past successes and challenges. Viewers get an inside look at their rehearsals, relationships, and the emotional impact of reuniting after years apart, making it a nostalgic experience for fans of the era.