Dierks, Breland and Hardy are at #1...Mitchell Tenpenny has a new EP... Congratulations go out to Dierks Bentley, Breland, and Hardy. Their three-way collaboration, "Beers on Me," tops the Mediabase country singles chart, giving Breland his first number-one country single. Chris Young's "At the End of a Bar" collaborator Mitchell Tenpenny has released his new EP, The Low Light Sessions -- and he considers the collection a bit of an autobiography.He says if you listen from start to finish you can tell…