Paris Hilton has taken a swipe at Kim Kardashian's series 'Keeping Up with the Kardashians' by insisting 'The Simple Life' is still the best reality show.

The hotel heiress claims is too busy to watch the popular E! reality series which catapulted her former friend Kim to fame and hailed her own reality series - which saw her and pal Nicole Richie work in a variety of unusual jobs - as ''iconic''.

In an interview with heat magazine, she said: ''Reality TV is a lot of hard work, and Kim has done well for herself. I don't watch reality TV now, because I don't have time. As far as I'm concerned, 'The Simple Life' was the best reality TV show going, and it turned 10 years old recently. It's timeless, iconic and you can still watch it.''

Paris - who recently finished her DJ residency in Amnesia nightclub in Ibiza - claims her busy work schedule won't allow for a reunion with Nicole on 'The Simple Life'.

She explained: ''They wanted us to do a 10-year reunion show recently, but Nicole and I were both too busy.''

Meanwhile, Paris insists there is no longer a feud with her 'Simple Life' co-star after a fall out between the pair saw Nicole replaced by Kimberly Stewart for the show's fourth season.

The 27-year-old blonde beauty explained she is ''happy'' for Nicole - who is married to Good Charlotte singer Joel Madden, with whom she has two kids, five-year-old Harlow and four-year-old Sparrow - and is supportive of her current endeavours.

She said: ''[Are we still friends?] Of course! We've been friends since we were two years old and we will always be close. I'm so happy for her with her family. She's so cute now.''