ET revealed that the Straight Up singer's mum died on Sunday January 14 in California.
Lorraine, who was an accomplished concert pianist, regularly attended A-list events with her daughter, including standing by her side when she received her star on the Hollywood Walk of Fame.
On Tuesday Paula took to Twitter to share a photo from a trip to Israel, where she reflected on living life to the fullest.
"EVERY MOMENT of life should be savored & treasured, whether we’re alone or w/ people we love," the 55-year-old wrote. "When can you pause today to appreciate life?