GOP convention so far not exactly brimming with star power

Country legend Loretta Lynn, the "Coal Miner's Daughter," has been vocal about her support of presumptive Republican presidential nominee Donald Trump, but Maria Malta, a spokeswoman for the singer, said she has not been contacted about performing at the Republican National Convention.

The Band Perry, a sibling country group, are performing a charity concert in Cleveland during the convention, but a spokesman for the group, Brian Bumbery, said the group is not attending the convention and has not publicly supported a presidential candidate.

Lynyrd Skynyrd and Kid Rock — who have long voiced their support for Republican causes — will be in Cleveland but they'll be performing private concerts to honor military veterans that are not directly associated with the convention, running from July 18-21.

Country singer Martina McBride will perform in Cleveland, but as part of a charity gala for the nonprofit, non-partisan The Creative Coalition, an advocacy group for the entertainment industry.

Even Eastwood, who stole the show at the 2012 Republican convention with his empty chair routine, isn't expected to make a similar surprise appearance in Cleveland.