Sir Paul McCartney and Katy Perry have handed over autographed neckties to a celebrity auction marking International Men's Day on Monday (19Nov12).

Hollywood stars Brad Pitt, Mark Wahlberg, Ty Burrell and singers Brandon Flowers, Jessie J and Mika have also contributed to the Loosen Up sale, organised annually by U.K. charity Cahonas Scotland to raise awareness of male cancers.

Pitt has handed over a signed grey Gucci bowtie, while MCCartney doodled a love heart and flower next to his autograph on the skinny brown tie he has donated to the cause.

Cahonas Scotland founder and chair Ritchie Marshall says, "As a charity focused on positive men's health, we at Cahonas Scotland fully support International Men's Day, and particularly this year's theme of positive role models for men. With their support and generosity we will make a real difference to the profile of men's health issues in 2013."

Neckwear donated by Dita Von Teese, Joanna Lumley, Stephen Fry and Stephen Merchant are also up for grabs on the Loosen Up Auction page on