The former Eurythmics star and the Irish singer/songwriter teamed up to perform his hit Take Me to Church and Lennox's version of I Put a Spell on You at the ceremony in Los Angeles in February (15).

Following the show, they both signed three souvenir Grammy Awards T-shirts, and the garments - which are identical but in small, medium, and large sizes - have now gone up for auction on

Proceeds from the sale will go towards The Annie Lennox Foundation, for women and children affected by HIV. The auction ends on 11 May (15).