Miranda Lambert, Kristin Chenoweth, Carrie Underwood, Trace Adkins, Jason Aldean, the Band Perry, Chris Young, Lauren Alaina and Scotty McCreery are just some of the many Nashville stars who lit up the Las Vegas sky Monday night. Check out red carpet pictures from the second annual American Country Awards by clicking on the 'Launch Gallery' link below, then let us know your picks for best and worst dressed in the 'Add a Comment' section! And see our full list of 2011 ACA winners and nominees here.