Jorja Smith wrote this at the age of 16 when she was babysitting. She told BBC Radio 6's Mary Ann Hobbs that she started humming a tune then came up with some lyrics "about some boy I liked that didn't like me back." You can hear some of Jorja's original humming on the recording that appears on Lost & Found.
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.
"Kickstart My Heart" is about all the ways Motley Crue gets their blood flowing without drugs. It was inspired by their bass player Nikki Sixx, who claimed he had to be revived with a shot of adrenaline to the heart after an overdose.