The song features AC/DC’s Brian Johnson on vocals and Aerosmith‘s ... It was one of the first songs I learned in my very first band. When he played me the backing track, it was a no-brainer ...

Seconds later, who should appear by the driver's seat but AC/DC frontman, Brian Johnson. "Hello, my darling,” Johnson greeted, earning shocked laughter from Gaga. “My little Lady Gaga.