YouTubeKevin Hart and Ludacris will be starring in new original series premiering exclusively on YouTube, the online platform announced today.

These series will be ad-supported shows, so everyone will be able watch them, unlike those on YouTube’s premium subscription service, YouTube Red, which is for member subscribers only.

Hart will headline a series called “Kevin Hart: What the Fit?”, which will see the actor/comedian team up with celebrity friends and YouTube stars each week, as they attempt to master a different trending, grueling and sometimes ridiculous workout routine.

Meanwhile, Ludacris will host “Best.Cover.Ever.” which hails from from Ryan Seacrest Productions and Endemol Shine North America, and is described as a cutting-edge talent competition series where emerging talent from across the globe, submit covers to YouTube to vie for the ultimate prize: an opportunity to perform a duet with a superstar artist. Submissions are now being accepted for the show at

“We’re excited to partner with top creators and world-class production companies to offer these new shows to audiences globally—on the platform where the world chooses to watch over a billion hours of video every day,” YouTube said in a statement. “People turn to YouTube to express themselves, engage with creators, and connect with the thriving communities they’re proud to be a part of.”

The rest of the upcoming lineup of shows launching with Hollywood celebs and YouTube stars, follows:

— “Ellen’s Show Me More Show”: Like nothing Ellen has done before, “Ellen’s Show Me More Show” is a twice-a-week series built just for YouTube, giving fans behind the scenes access to some of the biggest stars and her favorite moments.

“I Am: Demi Lovato”: Global music sensation and social advocate, Demi Lovato reveals a yearlong personal journey of music reinvention and deep discovery as she dives into the writing and recording of her new album in her new series, “I Am: Demi Lovato.”

— “Katy Perry Live Special”: It’s real. It’s raw. It’s Katy Perry. Live on YouTube, “The Katy Perry Live Special” will take you inside of her world, revealing the experiences and emotions she poured into her all-new soul-baring music on the eve of her highly anticipated album launch. With unique access, global reach and surprise fun packed along the way, Katy will break it all down in this album listen-along, and if you stick around long enough, there might just be fireworks.

— “Good Mythical Morning”: Worldwide YouTube superstars—and hosts of YouTube’s most popular daily show—Rhett & Link will go to new heights in a long-form expansion of “Good Mythical Morning,” giving fans even more of what they crave: larger-than-life stunts, zanier challenges, and over-the-top laughs.

— “The Super Slow Show”: YouTube stars The Slow Mo Guys will test the latest in technology to reinvent the way we look at celebrities, music, pranks, comedy sketches and more, giving a one-of-a-kind glimpse into what the world looks like in slow motion.