This ballad was originally recorded by Lemar on his 2003 debut album, Dedicated. In 2010 the British R&B singer re-recorded the track with boy band JLS for his greatest hits compilation The Hits. Lemar explained why to Blues and Soul magazine: "When I was on tour around The Reason, JLS were my opening support act - and they obviously put on a good show, as well as bringing loads of fans with them! So I'd spoken to the guys quite a few times - we're on the same record-label, we have the same management company… Plus I'd known Marvin (Humes) a little bit before he actually formed JLS with Oritse (Williams). So we just thought 'Why not get on a TRACK together?'... So I spoke to the record-label and they suggested 'What About Love' - which was on my first album - because, though we never put it out as a single, it's a song that always goes down a storm whenever we're on tour. You know, it's like everyone's waiting for that moment - they all sing along, phones in the air... So we just decided to go into the studio together to give the song a new twist and breathe some new life into it. And we had a lotta fun doing it!"
Angus Young created the distinctive opening guitar part for "Thuderstruck" by playing with all the strings taped up, except the B. He learned the studio trick from his older brother George Young, who was the rhythm guitarist for The Easybeats.