Kelly Osbourne, 39, is nearly unrecognizable as she shows off VERY svelte frame in a tank top and jeans in LA

Kelly Osbourne shares family snap to mark dad Ozzy's 75th birthday -  after rocker revealed he's got 'at best 10 years left'

Kelly Osbourne proudly shows off first tooth for son Sidney, 1, in sweet snap

Kelly Osbourne Calls First Year of Motherhood 'Magical' in Touching Birthday Tribute to Son Sidney