Hot on the heels of our XOXO Music announcement, we’re bringing two new speakers for the conference on Saturday and Sunday — mathemusician Vi Hart and cartoonist Erika Moen.

Vi Hart

Professional mathemusician Vi Hart is proving that maths is cool, one video at a time. Using little more than a Sharpie and a sheet of paper, Vi breaks down topics like Fibonacci sequences, binary trees and hexaflexagons, turning doodling in math class into entertaining, thought-provoking videos. As a result, she’s built an audience of over 500,000 subscribers in three years, with more than 41 million views for her YouTube videos. Last year, she joined the faculty of Khan Academy, bringing her unique take on math and music to the world’s most popular free online classroom.

In June, she released Twelve Tones, a tour de force spanning atonal music, constraints and copyright absurdity, over a year in the making.

Erika Moen

Portland-based cartoonist Erika Moen illustrated her personal life for the last decade, with frank and honest vignettes of sex, queer culture, and her own sexual identity. She ran her autobiographical webcomic DAR! for six years, released as two volumes, leading to an appearance on Penny Arcade’s Strip Search, an online reality show for web cartoonists.

Inspired by her Strip Search experience, Erika launched Oh Joy Sex Toy in April, a weekly NSFW comic about sex, sexuality and the sex industry, in collaboration with her husband Matthew.