There are, at least, two groups by this name. Ballyhoo (without the exclamation mark!) is a South African group who had a huge hit in 1980 in their homeland with their single 'Man On The Moon'. This South African group is still going strong. The other group with the same name (but with the exclamation mark!) is from Maryland, USA, a modern rock/reggae party band, active since 2006.
These are photos from concerts where Ballyhoo! played, so they may be of other bands that played the concert as well.
2016 Vans Warped Tour Jul 13, 2016 Mansfield, Massachusetts, United States Uploaded by Dave G.
Vans Warped Tour 2016 Jul 11, 2016 Scranton, Pennsylvania, United States Uploaded by Ghost Leash
Vans Warped Tour 2016 Jul 10, 2016 Hartford, Connecticut, United States Uploaded by Brittaniepayge96
Vans warped tour 2016 Jul 2, 2016 Orlando, Florida, United States Uploaded by Jordannntm
Vans Warped Tour 2016 Jul 1, 2016 St. Petersburg, Florida, United States Uploaded by Rackyx
Ballyhoo! / No Need Feb 26, 2016 St. Petersburg, Florida, United States Uploaded by Joshua B.
Rebelution / Collie Buddz / Zion I / Ballyhoo! / Los Rakas / Thrive! Sep 27, 2014 Tampa, Florida, United States Uploaded by Raúl Castillo
Tribal Seeds / Ballyhoo! Sep 11, 2012 Philadelphia, Pennsylvania, United States Uploaded by That Concert Chick Ashley
Vans Warped Tour 2012 Aug 5, 2012 Portland, Oregon, United States Uploaded by Edwin