Despite being in rehab herself several times, Kelly isn't bothered about what happens to Lohan, 24.
The 25-year-old told Access Hollywood: 'I honestly don't care, if she wants to get well, she'll get well - I'm not feeding her ego.'
The troubled star is currently undergoing treatment for alcohol and substance abuse issues after recently failing a drugs test.
Although socialite Kim Kardashian, 29, is more supportive of her pal.
The Keeping Up with the Kardashians star said: 'You just have to be supportive of your friends.
'She's a strong girl and I wish her the best.'