While most people use a holiday as a time to relax, Jennifer Lopez spent the last weekend of her vacation getting in shape ahead of her return to acting.

After taking a lengthy break from movies to focus on her singing career and motherhood, J.Lo is set to resume her film career with a role in Love And Other Improvements this week.

Lopez, 38, and her four-month twins Max and Emme have been touring Europe with husband Marc Anthony over the last month.

After Anthony's tour wrapped in Rome last Wednesday, the family and their entourage flew to Portofino in northern Italy for a few days R&R with designer pals Domenico Dolce and Stefano Gabbana.

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Bikini babe: Jennifer Lopez shows off her curves after giving birth to twins four months ago.

The couple have been spending their days on a luxury yacht moored off the exclusive yacht, giving Lopez the perfect opportunity to work out with a daily swim.

Lopez is getting back in shape in preparation for her film role in three years, alongside Lisa Kudrow, which starts filming in New York this week.

Despite gaining three stone while pregnant with her twins, Lopez is back to her famous curvaceous shape just over four months after giving birth.

Max and Emme were born via caesarean section in Long Island, New York on February 22nd.

Lopez has been in no rush to lose her baby weight, insisting she enjoyed playing with her belly.

Curves: Jennifer Lopez flashes her famous backside as she climbs onto the yacht

After taking it easy for the first six weeks after the birth, Lopez was back hard at work getting her famous figure trim again.

The singer, who turns 39 later this month, has been doing thrice-weekly workouts with trainer Gunnar Peterson.

Peterson's program includes 20-30 minute walks and sit-ups and lunges.

Despite her long swims during the day, Lopez made she kept her holiday evenings relaxed.

Leaving twins Max and Emme in the care of nannies, the couple joined Dolce and Gabbana for a lavish meal in Portofino.

Despite flashing her figure earlier in the day with a skimpy bikini, Lopez covered up curves in a pistachio, long-sleeved maxi dress - albeit flashing her cleavage.

Night out: Jennifer Lopez and Marc Anthony leave the twins at home for a night on the town with Domenico Dolce and Stefano Gabbana