Katy Perry Kisses John Mayer at Friars Club Roast in N.Y.C.

Katy Perry and John Mayer’s on-again, off-again romance appears to be back on.

After recently telling Vogue magazine that she was “still madly in love” with Mayer, Perry was spotted out with the “Paper Doll” singer at New York’s Greenwich Hotel on Saturday night and, later, at Monday’s Friars Foundation Annual Applause Awards Gala honoring Don Rickles at the Waldorf-Astoria.

Natalie Cole's Mother, Maria Cole, Dies of Cancer

Maria Cole, the widow of singing legend Nat “King” Cole, the mother of Natalie Cole and in her own right a former Big Band singer, died Tuesday in Boca Raton, Fla., after a brief battle with cancer, her family announced. She was 89.

“Our mom was in a class all by herself. She epitomized class, elegance, and truly defined what it is to be a real lady,” said Natalie Cole and her siblings, Timolin and Casey Cole, in a statement.

Natalie Cole Coping with Life's Joys and Sorrows

For Natalie Cole, the past four months can be summed up in one word: unforgettable.

Back in May, the singer received a life-saving kidney transplant. But when she came out of surgery, she learned her sister Cookie, who had been battling lung cancer, had passed away.

Natalie Cole Returns to the Stage in Hollywood

Four months after undergoing kidney transplant surgery, Natalie Cole made an energetic return to the stage Wednesday, belting out more than a dozen songs at a comeback concert in Hollywood.

“I really do have to say … it really is a miracle time. It’s a miracle night for me,” she told the crowd at the Hollywood Bowl. “I never thought I’d be standing here healthy and whole and 100 percent.”

Natalie Cole Feels 'Remarkable' with New Kidney

While she does not know who donated the kidney that potentially saved her life, Natalie Cole is on the mend and “really doing well,” the Grammy-winning singer said at Thursday’s Harold Pump Foundation Gala in Beverly Hills to honor Earvin “Magic” Johnson and Bill Russell.

“It’s remarkable what a new kidney does to your life. I have no complaints … I’m pretty amazed. I have been working on my stamina.”

Natalie Cole Celebrates Life with a Post-Surgery Concert

Just weeks after a successful kidney transplant, Natalie Cole has announced her performance comeback. The 59-year-old Grammy-winning singer says she will return to the stage on Sept. 9, appearing at the Hollywood Bowl.

Natalie Cole Is Released from the Hospital

Natalie Cole has been discharged from the hospital five days after undergoing a kidney transplant.

Cole headed home on Sunday to continue her recovery, her rep confirms to PEOPLE.

The Grammy winner, 59, planned to attend a private family memorial service on Monday for her sister Carol “Cookie” Cole, who passed away following a battle with lung cancer the same day Natalie received her life-saving organ transplant.

“Natalie is continuing to do well under the circumstances,” says her rep.

Natalie Cole's Sister Dies During Singer's Kidney Transplant

Natalie Cole was with her cancer-stricken sister Carole “Cookie” Cole when the Grammy-winning singer got the call: a donor kidney was available to save Natalie’s life.

“She said, ‘What do you mean? I can’t deal with that right now! I’m here with my dying sister!’ ” Natalie’s other sister, Timolin Cole, tells the New York Post. “And they said to her, ‘No, ma’am. We’ve got to do it now. You’ve got to be at Cedars-Sinai in two hours.’ ”

Natalie Cole Undergoes Kidney Transplant

Natalie Cole has a new lease on life.

The Grammy winner underwent kidney transplant surgery in L.A. on Tuesday and is now “resting comfortably,” according to her rep.

Cole, 59, has struggled with kidney problems while undergoing treatment for hepatitis C, which she was diagnosed with a year ago.

Pregnant M.I.A. to Rap at Grammys – On Her Due Date

Rapper M.I.A. had better add one more person to her Grammy entourage – a doctor.

The pregnant hip-hop star, who is nominated for two awards, is scheduled to perform at the ceremony Sunday, which is also her due date.