The bikini clad star posted the photo with the caption: ‘Who’s ready to have some FUN?!... What are you looking forward to this week?’
The singer gave birth to her third daughter, Madison, in 2011 before signing up to diet plan Jennie Craig.
Mel gradually lost her baby weight using the healthy, balanced diet plan and now it seems like she’s well and truly in peak physical condition.
The former Spice Girl insists, however, that she doesn’t deprive herself of treats.
She said in a recent interview: ‘I splurge on whatever I'm craving—either an In-and-Out cheeseburger or a traditional English Sunday roast.’
The star admits that she’s ‘obsessed’ with keeping her stomach in tip-top shape, making sure she allows time to fit in stomach crunches every day.
‘I do half an hour of cardio and 200 sit-ups three times a day,’ she says. ‘I've always been obsessed with doing abs. I change positions every 10 reps.’
Mel is also mum to daughter Phoenix Chi (15) from her marriage to dancer Jimmy Gulzar and daughter Angel (7) from a short-lived relationship with actor Eddie Murphy