Alice Bagnoli of Italy slaloms during the preliminary round of the 2023 IWWF World Waterski Championships at Sunset Lakes October, 13, 2023 in Lake County, Florida. (Photo by Johnny Hayward/Getty Images)

Jake Paul (left) lands a punch to the face of Anderson Silva during a boxing match at Desert Diamond Arena in Glendale, Arizona on October 29, 2022. (Photo by Mark J. Rebilas/USA TODAY Sports)

A runner takes part in the International World's coldest marathon at minus 53 degrees (–63.4 Fahrenheit) near Oymyakon, the republic of Sakha, also known as Yakutia, Russian Far East, Saturday, January 22, 2022. Sixty five runners, including athletes from the United Arab Emirates, United States and Belarus, started the run at extremely low temperature in Oymyakon, Yakutia's Pole of Cold. The international team of men and women ran full distance and half-marathon. (Photo by Ivan Nikiforov/AP Photo)

Maria Sakkara of Greece in action against Ann Li of the United States in her second round match at the Qatar TotalEnergies Open at the Khalifa International Tennis & Squash Complex on February 22, 2022 in Doha, Qatar (Photo by Robert Prange/Getty Images)

A visitor checks automatic gun during International Defence Exhibition and Seminar (IDEAS) 2022 at the Expo Centre in Karachi on November 16, 2022. (Photo by Rizwan Tabassum/AFP Photo)

More than 700 underwater images were submitted for the 2012 Annual Underwater Photography Contest, hosted by the University of Miami's Rosenstiel School of Marine & Atmospheric Science. This year, for the first time, the University of Miami set up a “Fan Favorite” category for its underwater photo competition. Internet users could vote for their favorite among five pictures. Todd Aki's photo of a jellyfish took the prize, snaring 599 of the 1,221 votes cast. (Photo by Todd Aki)

Wrestler Kairi Hojo jumps at her opponent Mieko satomura during their Stardom female professional wrestling show at Korakuen Hall in Tokyo, Japan, July 26, 2015. Professional women's wrestling in Japan means body slams, sweat, and garish costumes. But Japanese rules on hierarchy also come into play, with a culture of deference to veteran fighters. The brutal reality of the ring is masked by a strong fantasy element that feeds its popularity with fans, most of them men. (Photo by Thomas Peter/Reuters)

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!