eBay turns fifteen this week. Can you believe it?

To celebrate the past fifteen years, we've revisited the most unusual celebrity items ever listed on the beloved bidding platform.

From captured breath in a jar (yes, really) to a used tissue in a sealed sandwich bag. We're warning you now, there are some real strange 'uns...

Without further ado, here are the seven strangest celebrity items found on eBay:

1) Britney Spear's used chewing gum was listed at roughly £8,400 on the site. Note: we don't think anybody actually made the purchase. 

2) Scarlett Johansson's used tissue (gross) was auctioned for $5,300. The proceeds went to charity.

3) A lock of Justin Bieber's hair sold for $40,668. We wouldn't be surprised if he's been cloned.

4) Angelina Jolie and Brad Pitt's breath in a jar – yes, really – reportedly sold for $530. 

5) More recently, Niall Horan's half eaten triangle of toast (complete with vegemite topping) attracted $100,000 in bids on eBay.

6) James Blunt decided to auction his sister on the site – he's definitely got a sense of humour.

7) Finally, Michael Jackson's pants sold for a million bucks. There are no words.

Many happy returns, eBay. Here's to the next fifteen years of bizarre yet brilliant auctioning.

Image by Getty