In February 2007, they celebrated their sixth year together in the Hong Kong music industry. They released a special Sixth Anniversary New + Best Selection CD/DVD. In September of the same year, Twins embarked on a multi-city North American concert tour, with special guests Sun Boy'Z. International stops included San Francisco, Toronto, and Atlantic City. It was their first time performing on a major tour across several North American cities. In 2007, Twins released their ninth studio album "Twins Party". The album was a success. It was released in three versions: Twins version, Gillian solo version and Charlene solo version.