... 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 good sense of what they would've looked like.
Click through to see them all.
The former Beatle died in 1980 at age 40, after being shot to death by deranged fan Mark David Chapman.
If he were alive today, he would be 73 years old.
After years of prescription drug abuse, Elvis succumbed to his various health ailments on August 16, 1977, at the age of 42.
Today, he would be 78 years old.
Janis (or Pearl, as her friends called her) passed away from a drug overdose at the tender age of 27 in 1970.
However, if she were still with us, she would have celebrated her 70th 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 46-year-old in 2013
The Lizard King may have lived hard and died young (28), but that still doesn't stop us from imagining him as an older gentleman.
Here he is, at what would have been the cusp of his 70th birthday.
Another member of the sad class of rock stars who died at age 27, had Jimi not overdosed in 1970, he would have turned 71 this year.
The hard-rocking drummer of the Who passed away in 1978 from a drug overdose at 32 years old.
Were he still banging on the skins today, he'd be 67.
The Carpenters lead singer sadly passed away in 1983, at only 32 years old, from heart failure related to her battles with anorexia.
Here she is pictured as if she had made it to 63 years old.
The Beach Boys drummer, singer, songwriter and founding member sadly drowned in 1983, a few days following his 39th birthday.
But if he were still harmonizing today, this boy of summer would've been turning 69 this year.
The Mamas & the Papas singer died on July 29, 1974 at age 32 from a heart attack following a performance at the London Palladium. (Contrary to urban legend, the cardiac failure was most likely brought on by extreme weight loss — not from choking on a sandwich.)
Today, "Grandma Cass" would have been 72.
The reggae star, who brought Rastafarianism to the mainstream, succumbed from cancer in 1981 at only 36 years of age.
Had he managed to survive, however, he and his dreads would have turned 68 this year.
The multi-talented singer, songwriter and actor died following a heart operation in 1973 at only 37 years of age.
He would have turned 78 this May.