Chris Willman Music WriterProving that it’s not too enslaved to its alternative rock roots, Lollapalooza announced its 2022 lineup Tuesday morning, with a slate of headliners that incorporates pop, hip-hop, metal and even bluegrass, featuring the likes of Metallica, Dua Lipa, Lil Baby, Doja Cat, J. Cole, Machine Gun Kelly, Charli XCX, the Kid Laroi and Billy Strings.The group with the No.