Clint Eastwood's speech at the Republican National Convention on Thursday, Aug. 30 has received mixed reactions from Hollywood, music stars and the President himself. The "Unforgiven" actor, who was the RNC's surprise guest speaker, delivered his remarks with an interesting concept--he addressed an empty chair pretending President Obama was sitting in it while commenting on several current policies. A long list of celebrities critiqued Eastwood's speech on Twitter: HBO "Newsroom" star Olivia Munn, CNN's Piers Morgan, Seth Meyers, Chris Rock, Adam Levine and even the President.