Posted on: E! Online By: Carissa Loethen

You know what January means? Time to start on those New Year fitness resolutions. Like, immediately. Chop, chop!

If one of your goals happens to be tummy-focused then stick around because we’ve rounded up five hardcore ab workouts that are sure to whittle your middle in no time. Or, more accurately, in just a few weeks.

That’s right, we’re borrowing a few workout tricks from Jessica Alba, Brooke Burke and more celebs with fab abs. So allow Instagram to become your personal trainer by watching these videos below.

the Gunnar commentary. @gunnarfitness

A video posted by Kendall Jenner (@kendalljenner) on

Jessica Alba has always been known for having one of the best bodies in Hollywood, and the mother of two works hard for that title. Her Instagram video teaches us how to combat that lower belly bulge. Alba admitted she was sore after putting herself through a series of ab-shredding double-leg lifts.

  Boxing Part 4. Warmin’ up with @iammissyelliott #workoutwednesday #boxing   A video posted by Padma Lakshmi (@padmalakshmi) on

Another difficult drill is Padma Lakshmi‘s extremely intense plank routine. If you’re not in the same shape as the Top Chef host, try doing this without the pushups and weights.

Training for my next Film. Bastille Day. Grinding. A video posted by 7dub (@7dub) on

Have you seen Idris Elba‘s abs lately? Let’s just say, they’re inspiring to say the least. The 42-year-old actor is shirtless and sexy in his workout video. While on his knees, Idris clasps his hands to a barbell, then uses his ridiculously defined ab muscles to roll the bar back and forth.

Morning with @goodhealth. Awesome triangle crunch! #fitness

A photo posted by Brooke Burke (@brookeburke) on

Alright, ready for your last ab challenge? Brooke Burke-Charvet shows us how to work those obliques with a triangle crunch.

The brunette beauty has several fitness tips for those focused on getting back in shape, like, “If you’re not sweating, you’re not working out hard enough.” Well said, Brooke!

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