Kelly Osbourne Gives Update on Mom Sharon: 'She's Having Fun'

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Kelly Osbourne gave ET a health update on mom Sharon's month-long hiatus from The Talk.

NEWS: Sharon Osbourne to Take Month Leave From The Talk After Collapse

"My mom is fine," Kelly told ET at the CFDA Fashion Awards on Monday. "Honestly, she just cannot start work at 4 a.m. and wrap at midnight, sleep at 2 a.m. and have two hours sleep a day and keep on going. We're like, 'Mama, it's time for you to have a break.' So she's with her girlfriends. She's having fun. She's on vacation and it's great."

According to Sharon's rep, the talk show host "collapsed from mental and physical fatigue" after a grueling schedule in New York and Toronto.

It's been an especially trying year for the cancer survivor. The 62-year-old mother of three had hernia surgery in March and then caught pneumonia.

WATCH: Sharon & Kelly Osbourne Reveal What Makes Them 'Best Friends'

"Her doctors report that she is suffering from 'extreme exhaustion' and assessed that she most likely returned to work too soon after being hospitalized recently for pneumonia," her rep added.

Kelly filled in for her mom on the talk show after the surgery.