GIRL band The Saturdays and soul singer Lemar were announced as the final acts for The Manx Telecom Bay Festival in June.
Festival organiser Jamie Irving said: "Who better to complement the BRIT nominated JLS than the sensational Saturdays? In addition to that I'm very pleased to announce the mother's favourite Lemar.
"The 2010 Manx Telecom Bay Festival brings together influential world class artists of all musical styles including The Coronas, The Feeling, and the truly unique Boy George.
"People are buying tickets left, right, and centre at the minute and long may it continue."
The Saturdays have had five hit singles and their debut album went platinum. In 2009 they supported Take That on their Circus Tour.
Lemar rose to fame on the BBC One show Fame Academy and went on to win two BRIT awards and a MOBO award.