The Mean Girls star's troubles became a talking point this week (begs02May11) when a clip from Hilton's new programme, The World According to Paris, hit the internet. In the footage, Hilton is heard making a jibe about Lohan's problems as she visits a homeless shelter and hands over a pair of earrings to one woman, who mistakes her for the troubled star.

The woman tells Hilton, "I'm going to give them to my sister as soon as I get back to Oklahoma and I'm going to tell them that Lindsay (gave them to me)... I thought you were supposed to be in rehab?"

Realising the identity mix-up, Hilton responds, "I'm not Lindsay!", before joking about Lohan and adding in a voiceover: "If I were Lindsay, I'd be stealing the earrings, not giving them away."

But now the hotel heiress has seen the error of her ways and apologised for the comments, telling TMZ.com, "I apologise to Lindsay for the comment that I made. I was joking around but it was thoughtless and unnecessary... I am reaching out to Lindsay so I can tell her myself."