I'm not going to spruik you bikini bodies or any of that crapola. The truth is, you need strong abs for life. They are essential in good posture, in maintaining your spine and hips and body in safe and optimum alignment for all activities (and at rest!).
The idea of "flat abs" is brilliant marketing, because it's not realistic for most people. That said, if you have a disproportionate amount of fat around the waistline, this can be a risk factor for diabetes, metabolic syndrome, PCOS and more.
No amount of planks or pilates will compensate if you are not eating well - that doesn't mean restriction and dieting (nasty cycle that will only make you feel awful!) but that you are aware of eating a decent serve of veggies (especially green), fruit (so many choices!), legumes, wholegrain carbs (love rye bread or wholegrain pasta) and lean protein (fish, skinless chicken, prawns, tofu).
This time of year it's tempting to overdo everything but try to keep your workout routine. Not just for the sake of your abs, but your sanity.

10 To 2

Lie on your back, pressing your whole spine into it.

Slightly tuck the chin down to lengthen the neck and press the shoulders to the mat.

Raise both legs, pointing toes with a slight turn-out (like a mini plie) to the roof

Keeping legs pressed together, take them to the 10 o'clock position.

Centre, then direct legs to the 2 o'clock position.

Repeat x 10 each direction

Double Leg Extension

Again, press spine into the mat firmly.

Curl the shoulders up away from the mat and lift the knees over the hips.

Inhale to extend the arms and legs as straight as you can.

Exhale to return knees over hips and arms reaching for toes.

Repeat x 10 - 15

Single Leg Teaser

Lie on your back, knees bent with heels aligned with hips. Raise one leg with thighs parallel.

Inhale to prepare and reach the arms up.

Exhale to curl the shoulders up away from the mat and reach for the toes of the raised leg.

Inhale to curl back down (don't drop!)

Repeat 8 on each side

Plie with Elbow to Knee

Get into a wide plie position, making sure your knees are tracking toward your 2nd toe.

Knees aligned over the ankles.

Maintaining your lower body in perfect stillness, take fingertips to ears.

Lower the elbow towards the knee then return to centre before reaching to other side.

Repeat 10 on each side

Single Leg Extension

Stand with feet hip distance apart.

Draw the belly button towards the spine and contract the shoulders to open the chest.

Maintaining the hips at the same level (don't hitch up on one side!), extend one leg back as you reach forward.

Hold for a count of 3.

Return to standing on one leg.

Repeat 10 times each side

Beware: Don't twist at the hips! Think about maintaining the hip bones in the same direction at all times

Tabletop Elbow To Knee

On your hands and knees, with wrists directly under shoulders and knees under hips.

Draw belly button to spine and avoid arching the back or rounding up.

Lengthen the back of the neck and direct the crown of the head forward.

Extend alternate arm and leg to make a long straight line.

Hold for 2 seconds then bring elbow to knee in the centre.

Repeat 10 times each side

Not just to gain that sculpted muscle that looks fab, but to ensure you are strong from every angle and really challenging the biggest muscles in your body to be fired up, able to endure and support great alignment, posture and balance.

Thigh Stretch: Kneeling with knees directly under your hips. Shoulders back and chest open. Without tilting your hips, maintain a straight line from top of the head to the knees as you lean back to 45 degrees. Keep your chin parallel to the floor and eyes ahead! Hold 2 seconds. Repeat 10 times.

Plie in 2nd: Whether you use a barre, or a chair, or a desk for support, make sure you are only holding lightly. You want your body to do all the work! Bend at the knees and make sure your knees are in line with your middle toes. At the lowest point, your hips are in line with your knees and your knees are directly above your ankles (don't stand too narrow!). Avoid hunching forward. Raise and lower in a straight line for 20, holding at the bottom for 2 seconds. Extra challenge? Raise your heels the whole set.

Frog Press: Lying on the mat, bend your knees and take them wide. Keep your heels locked together and toes pointing outwards. Press your legs out straight at 45 degrees then return. Make sure your lower back doesn't raise off the mat! Repeat for 10, rest for 30 seconds and do another 10!

Frog Press Reverse: Lying on your tummy, take your legs out wide and bend your knees. Keeping your knees wide, lock your heels together and flex your feet. Without raising your head, squeeze your bum to lift your thighs off the mat and hold for 2 seconds before returning. Repeat 10 times, rest for 30 seconds and repeat again.

Warrior 3 or Arabesque: Pushing into every edge of the foot, make sure you are standing firmly then reach forward with the arms as you raise one leg to hip height behind you. Hold for 10 seconds then return. Swap sides. Repeat on each leg 3 times.

BODY BEAUTY TIP! Bare your legs and arms with pride. After a shower, generously spray Vaseline Intensive Care Spray (Fragrance Free) all over. No dry elbows and heels happening here! Buy it at Priceline.