Danish pop group Lukas Graham were surprised to receive three Grammy nominations for their global hit “7 Years”, says frontman Lukas Forchhammer.

The group is competing for “Song of the Year,” “Record of the Year” and “Best Pop Duo/Group Performance” at the Grammy Awards to be held in Los Angeles on Feb. 12.

“We hope for everything and we try to work harder than the people we meet on the road but we don’t expect to be honored in this way. And the Grammys mean a lot especially because it is a peer to peer voting system,” Forchhammer, 28, told Reuters Television.

Forchhammer said he draws inspiration from his past growing up in Christiania, a celebrated hippy enclave within the Danish capital, Copenhagen. The recent birth of his daughter, Viola, added a new element to his writing, he said.

“I write about what my life experiences and my life situation is, so of course there is going to be songs about becoming a father,” he said.

“But I feel that having a baby has also opened this other dimension where it is easier for me to write songs where the stories are not necessarily about my life. It’s something about what you are looking at,” Forchammer said.

“7 Years” went quadruple platinum, reaching No. 2 on the Billboard Hot 100 chart, and is the highest selling single from a debut artist this year.

Lukas Graham consists of lead singer Forchhammer, bassist Magnus Larsson, drummer Mark “Lovestick” Falgren and Morten Ristorp on the keyboard.