Why is Luke Bryan Getting Internet Flack Lately?

Social media was buzzing over Luke Bryan's less-than-impressed facial expression during last Thursday iHeartRadio Music Awards.

The camera caught the usually animated Luke looking, well, a little bored during pop singer Ariana Grande's performance. Luke joked on Twitter, "Wow, me concentrating doesn't look good." He even posted a screen-shot of the moment in question, with him sitting alongside Blake Shelton. For the record, Blake doesn't look too enthused, either.