On Tuesday – aka Giving Tuesday – Google will repurpose its video broadcasting service called Google+ Hangouts to help host an online “Hangout-a-thon” that aims to connect those interested in making charitable donations with a worthy cause of their liking. Like a modern-day telethon, the “Hangout-a-thon” will feature celebrities, including Jennifer Garner, Chris Daughtry and Sophia Bush, plugging their favorite non-profit or charity, says Google. Organizations like Unicef, Charity Water, Save the Children, the Malala Fund, The Trevor Project, and several others will be involved, asking donors to give to help improve clean water access, eliminate bullying, provide disaster relief in the Philippines and more, Google explains in a post this morning announcing the event, that will take place tomorrow starting at 9 AM ET on the “Giving Tuesday” Google+ page.