After singing a few songs ... AC/DC's lead singer, Brian Johnson, jumped right into the passenger seat, causing Gaga to burst out laughing, before hugging him. "Hello, my darling," Johnson ...

You brought me Brian Johnson?" says Gaga with a smile ... Gaga shows a video of her grandmother scream-singing the lyrics to "Highway to Hell" amid cackles. "She had a really hard life and ...

Brian Johnson tells Dan Rather about writing for the 'Back in Black' album and being challenged to write lyrics. Talk about a tough choice! Two legendary singers enter, but you'll vote on which ...