In this November 18, 2015 photo, 9-year-old Mahiro Takano, center, three-time Japan karate champion in her age group practices in Nagaoka, Niigata Prefecture, north of Tokyo. Mahiro stars in singer Sia's latest music video "Alive", the just-released single from the singer's upcoming album. (Photo by Eugene Hoshiko/AP Photo)

A general view of atmosphere during 2016 New York Comic Con – Day 1 on October 6, 2016 in New York City. The annual event offers pop culture fans exhibitors and displays of popular video games, movies and comic books and many people attending dress as their favorite character. (Photo by Daniel Zuchnik/Getty Images)

Thousands gather to rally for marriage equality ahead of a national postal survey on September 10, 2017 in Sydney, Australia. The High Court handed down its decision on Thursday to allow the government's proposed postal ballot survey to go ahead. Ballots with the question “Should the law be changed to allow same-sеx couples to marry?” will be sent to households across Australia on September 12. (Photo by Jonny Weeks/The Guardian)

Camila Hormazabal, a 24-year-old sеx worker, meets with a virtual customer in Concepcion, Chile on April 7, 2020. Hormazabal now offers sеxual services online after the nightclub where she had worked was closed due to the outbreak. With no way to pay her bills, Hormazabal switched to video calls conducted from her high-rise apartment bedroom, and asked her regulars to meet her online. She is one of the thousands of sеx workers worldwide left in a precarious position after the very intimacy that defines their work was thwarted by social distancing measures. (Photo by Juan Gonzalez/Reuters)

Lil Bub is a female “perma-kitten” house cat born with several genetic mutations causing dwarfism, polydactylism and disformed lower jaw. Bub rose to fame online after her owner Mike Bridavsky began uploading videos of her to YouTube in November 2011.

With more than 40,000 followers on Twitter and 26,400 fans on Vine, it looks like Marutaro the hedgehog from Japan is one of the most popular hedgehogs on the Internet. And as his owner keeps on posting Marutaro’s pictures online daily, Marutaro’s popularity continues to grow. There are hundreds of cute photographs and videos of this little fellow, but the ones with little paper cut-out faces are probably the cutest. As Marutaro lies on his back, his owner gives him a variety of silly expressions and smiles. The 20 best of them will definitely boost your mood!