Alan O’Day, a singer/songwriter who penned several hits for others before finding his own success, has died from complications of cancer. He was 72 years old.

O’Day wrote successful songs for artists like The Righteous Brothers, Cher, and Helen Reddy in the early ’70s before finding his own fanbase with “Undercover Angel” in 1974. Later, he wrote songs for popular television shows, such as the children’s cartoon “The Muppet Babies”.

“Alan continued to write and perform until his last days,” a statement from 1st Phase Records reads. “Alan was a generous man who gave his heart and soul to the music industry.”

‘Undercover Angel’ Singer Alan O’Day Dies at 72 j.mp/12EFki8 via @thr sad to read. Undercover Angel is still a great song.

— JJ Lair (@jjmonmouth) May 19, 2013

Even though he had one major hit as a singer, Alan O’Day was a wonderful songwriter who sadly did not receive the… fb.me/zFCb4WgN

— Ronnie Dark (@RonnieDarkWax) May 19, 2013

This makes me sad. ‘Undercover Angel’ Singer Alan O’Day Dies at 72 j.mp/12EFki8 via @thr

— Piss on the IRS (@62dw) May 19, 2013

Thefirst time I met Alan O’ Day was @ a songwriter’s gathering years back. RIP old friend. U will be missed, but your music willlive on.

— Gregory Watton (@thewattonshow) May 19, 2013