The 'Price Tag' hitmaker shaved her head on live Tv last Friday as part of the star-studded telethon and donned a white and red polka dot catsuit made for her by British costume designer Wendy Benstead.
The 24-year-old British star went one step further in her efforts to raise money for charity by auctioning off the bespoke catsuit.
The outfit raised a further USD 600 for the cause when bidding closed on auction website eBay.Com Sunday night.