LOS ANGELES - Don't try asking Paris Hilton if she is a has-been.
Hilton, 30, walked out of a television interview, portions of which aired on Wednesday, after being asked whether other reality TV stars have grabbed the celebutante limelight from her after 15 years of being famous for being famous.
The question by an ABC network reporter was prompted by dismal audiences for Hilton's latest TV reality show "The World According to Paris", which debuted to just 400,000 US viewers on cable channel Oxygen in early June.
"Do you worry at times that the people who have followed in your footsteps, like Kim Kardashian, have overshadowed you," ABC News journalist Dan Harris asked Hilton.
"No, not at all," she replied, adding tersely that she was not upset about the low ratings for her TV show.
"Ever worry about your moment having passed?" pressed Harris.
Hilton gave a derisive "Huh" and walked off for what Harris described as a long and heated talk with her publicist.
She later resumed the interview and said, "I've been doing this for 15 years now, so it's been a long time. So just like any other business person or someone in the industry, it's always important to reinvent yourself and come up with new projects."
Excerpts were shown on ABC chat show "Good Morning America" on Wednesday, with the full interview to run on ABC's "Nightline" later in the day.
Hilton, the great-granddaughter of Hilton Hotels founder Conrad Hilton, has built a multi-million dollar business of fashion, perfume and other products based on her celebrity and lavish Los Angeles lifestyle.
In the mid-2000s, Hilton and her friend Nicole Richie, daughter of singer Lionel Richie, starred in reality TV show "The Simple Life," in which the two of them traveled through the United States living and working with ordinary Americans.
Kim Kardashian, 30, and her socialite sisters however have caught up fast since 2007 on the back of reality show "Keeping Up With the Kardashians" and multiple spinoff TV series.
The latest series of that show debuted in June to 2.5 million viewers, while the raucous Nicole "Snooki" Polizzi of "Jersey Shore" fame helped attract more than eight million US viewers to that reality show's third season earlier this year.