|The Irish trio - The Original Rudeboys|
A member of the group Sean Walsh said: "Even though it's a huge opportunity to play in the O2 with a major hip hop star and a substantial fee was offered, we are completely against Chris Brown's assault on Rihanna."
The group also claimed they didn't want to mislead their own fans as their latest single 'Blue Eyes' is about domestic violence.
Sean said: "In addition, with our latest single 'Blue Eyes' being about domestic violence it goes against everything we are about as a band and supporting Chris would send out the wrong message to our fans."
Chris - who recently rekindled his romance with the 24-year-old popstar despite still being on probation for assaulting her - is due to perform at Dublin's O2 arena on December 3 as part of his European Tour.
The 23-year-old singer is reportedly planning to attend the 'Diamonds' singer's star-studded Halloween party in Los Angeles tonight.
Rihanna has splashed out $100,000 and offered to cover the entire bar tab for the bash but is concerned Chris's ex-girlfriend Karrueche Tran might show up uninvited.
Here's the The Original Rudeboys singing "Live Your Life":