... if John Lennon, Jim Morrison, Janis Joplin and several other iconic rock stars hadn't died before their time. While we will never know what music they may have written, thanks to modern technology we can get a pretty good sense of what they would've looked like.
Click through to see them all.
He was shot to death by deranged fan Mark David Chapman in 1980, when the former Beatle was 40.
If he were alive today, Lennon would be 74 years old.
After years of prescription drug abuse, Elvis succumbed to various health ailments on August 16, 1977, at the age of 42.
Today, he would be 80.
Pearl, aka Janis Joplin, died of a drug overdose in 1970, at age 27.
If she were still with us, she'd be celebrating her 72nd birthday this year.
Since he died at the age of 27 in 1994, the "Smells Like Teen Spirit" singer remains young in the public's memory. Until now.
Here is what Nirvana's frontman would look like as a 48-year-old in 2015
The Lizard King may have lived hard and died young, at 28, but that still doesn't stop us from imagining him as an older gentleman.
Here he is, around what would have been his 72nd birthday.
Another rock star who sadly died at age 27—in 1970, following a drug overdose.
Hendrix would now be 73.
The Who's hard-rocking drummer died in 1978, also from a drug overdose, at age 32.
Were he still kicking over his drum kit today, Moon would be 69.
The Carpenters' lead singer died in 1983, at 32 years old, from heart failure related to anorexia.
Today, she'd be 64.
The Beach Boys' drummer, singer, songwriter and founding member drowned in 1983, a few days after his 39th birthday.
If he were still harmonizing today, Wilson would now be 70.
Mama Cass died on July 29, 1974, at age 32 after suffering a heart attack in London, following a period of extreme weight loss. (Contrary to urban legend, she did not choke on a sandwich.)
Today, "Grandma Cass" would be 73.
The reggae star succumbed to cancer in 1981 at age 36.
Had he survived, Marley would have turned 70 this year.
The singer, songwriter and actor died following a heart operation in 1973 at 37 years old.
Today, he would be 78.