G4 go for the thrill of the ride.
The quartet enjoyed the thrilling experience of G Force, a new ride fitted with "big boy" seats for larger-than-average fun-seekers.
It is the first ride in the world to use a revolutionary hip restraint system catering for adrenaline junkies of all sizes.
Crowds gathered below the pounds 3million ride at the site, near Tamworth, to watch G4 sing their version of Frank Sinatra's My Way from the front car of the rollercoaster.
The screaming band members were then propelled through high-banked twists and turns at speeds of up to 45mph and at heights of more than 20 metres.
G4 - Jon Ansell, Matt Stiff, Michael Christie and Ben Thapa - were joined by 19-stone "big boy" Dave Sargeant, who had been hand-picked to test the ride on behalf of outsize Britons.
The 39-year-old trucker, of Berkshire, has a 56in chest.
DOING IT OUR WAY: G4 band members prepare for the thrill of the newest Drayton Manor ride, G Force