Aerosmith's Steven Tyler, center, guitarist Brad Whitford, left, and drummer Joey Kramer, right, perform during the opening night of the Global Warming Tour at the Target Center in Minneapolis on Saturday, June 16, 2012. (AP)

 

Aerosmith's Steven Tyler performs during the opening night of the Global Warming Tour at the Target Center in Minneapolis on Saturday, June 16, 2012. (AP)

 

Aerosmith guitarist Joe Perry performs during the opening night of the Global Warming Tour at the Target Center in Minneapolis on Saturday, June 16, 2012. (AP)

 

Aerosmith's Steven Tyler, left, and guitarists Joe Perry, right, and Brad Whitford, rear, perform during the opening night of the Global Warming Tour at the Target Center in Minneapolis on Saturday, June 16, 2012. (AP)