According to TMZ.com
Sources close to Summer tell us … the singer was trying to keep the extent of her illness under wraps. We spoke to someone who was with Summer a couple of weeks ago … who says she didn’t seem too bad.
In fact, we’re told she was focused on trying to finish up an album she had been working on.
Summer was a 5-time Grammy winner who shot to superstardom in the ’70s with iconic hits like “Last Dance,” “Hot Stuff” and “Bad Girls.”
Check out her “Hot Stuff” video:
She is survived by her husband & her two daughters. Condolences go out to the family.