She seems to do more good with her clothes off than with her clothes on.

Former Hugh Hefner girlfriend Holly Madison helped the Las Vegas Convention & Visitors Authority earn a Guinness World Record on Thursday by staging the world’s largest bikini parade.

The parade saw 281 bikini-clad ladies, who had to send in their measurements to get approved prior to the event, march down the Las Vegas Strip before Holly hosted a swimwear retrospective of bathing suits from the fifties to the present day. 

Click through our gallery from the sexy bikini parade. Hot or not? Tell us in the comments! 

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