Each week we run down the hottest merchandise from the hottest pop artists so you can discover, discuss and debate yet another aspect of these omnipresent icons.  With merch as unique as their personalities there are always surprises to be discovered like <a href="https://www.merchbar.com/pop/katy-perry">Katy Perry Costumes</a>, <a href="https://www.merchbar.com/pop/5-seconds-of-summer/">5 Seconds of Summer jerseys</a>, <a href="https://www.merchbar.com/pop/lady-gaga/lady-gaga-soda-can-wig">Lady Gaga wigs</a>, <a href="https://www.merchbar.com/pop/britney-spears">Britney Spears merch</a> and more.</br>


Math Rock