Kim Kardashian has been inspired to diet by Jennifer Lopez.

Kim Kardashian

Kim Kardashian

The 35-year-old beauty recently reached her goal weight of 120lbs after giving birth to son Saint last December but she now wants to shed even more pounds after helping to celebrate the singer's 47th birthday in Las Vegas over the weekend.

Writing on Instagram, the 'Keeping Up With The Kardashians' star said: I know I'm a little late but Happy Birthday to my girl @jlo We had the best time in Vegas celebrating your birthday & after seeing your show I started my diet again LOL I've never met anyone who ages backwards! So beautiful inside & out! Forever my inspiration! (sic)."

Kim - who also has three-year-old daughter North with husband Kanye West - recently embarked on a strict exercise and diet regime in a bid to lose 70lbs.

And last week she revealed: "I'm definitely to my goal weight. I'm down more than I expected."

Kim followed the low-carb Atkins diet and said she found it very easy.

Jennifer Lopez and Casper Smart
Jennifer Lopez and Casper Smart

She revealed: "I think if you just really stay motivated and focused, the Atkins diet was so easy for me because there's so many sweets and treats that keep you satisfied along the way."

Speaking about her exercise regime, she added: My sisters are really into working out right now,. So when you have a good support system and you all want to just get it together... Kanye is super into working out. It just makes it easy."