Kourtney Kardashian tweets vintage bikini snap of Kim amid reports new mother fears fans are 'losing interest'

She's deliberately remained in hiding for two months following the birth of her daughter North West.
But in an abrupt about turn Kim Kardashian is now said to be worried her fans are losing interest in their former idol.
Luckily her sister Kourtney was on hand to remind followers of Kim's existence on Wednesday, by tweeting a revealing bikini snap of the two taken on holiday in Mexico in 2011.
With the strange caption, 'Squallay.  kimkardashian,' the shot shows the siblings walking on the beach with Kim showing off her killer curves in a green bikini.

Back in the day: Kourtney Kardashian posted on old bikini photo on Instragram on Thursday to remind struggling sister Kim how hot she was

The vintage picture comes as the new mother is battling to lose the baby weight, ahead of her 'big debut'.

After welcoming her daughter with Kanye West on June 15, Kim decided to hide out at her mother's house until she had shed the excess pounds.

But two months on she is now afraid that she has waited too long to showcase her slimdown and that her star power is slipping.

'Kim has had this plan to show off how great she looks after giving birth and selling the pictures or videos for a lot of money, but she’s getting worried that it’s been too long and people aren’t as excited about seeing her anymore,' a source told RadarOnline.com.

Weight gain: Struggling to lose the pregnancy pounds, Kim (pictured here in May) is worried that her star is losing its sparkle

'Kim is used to having millions of adoring fans begging to see her all the time, but there has been a shift in her fan base and she’s getting nervous that people don’t care as much about her,' the insider revealed.

The Keeping Up With The Kardashians star is even worried that she can't compete with the world's most famous birth, that of Prince George.

'After all the excitement the whole world had for Kate Middleton’s royal baby, Kim had hoped that people would care about her that much, but now she’s freaking out that they’re not.'

Proud parents: With Kanye West as her baby daddy (pictured here at the Met Gala in May), Kim's love life is kept in the spotlight

Desperate to keep tongues wagging about her, Kim stuck out her own tongue in a silly Keek video that she posted to social media on Tuesday.

This followed her first post-pregnancy appearance in a brief video for Kris Jenner's daytime chat show earlier this month.

In the pre-taped segment, she surprised viewers with a short message, saying: 'Hey mom, I just wanted to say congratulations on your new show. I’m sorry I couldn’t be there in person, but I’m just loving life a little bit too much at home right now.'