Czech Republic's Tomas Machac in action against Norway's Casper Ruud during their men's singles match on day two of the Australian Open tennis tournament in Melbourne on January 17, 2023. (Photo by Hannah Mckay/Reuters)

Ireland's Lucy Mulhall (L) tackles USA's Ilona Maher during the World Rugby Women's Sevens series match between Ireland and the United States at the Allianz Stadium in Sydney on January 29, 2023. (Photo by Jeremy N.G./AFP Photo)

Manchester City's Phil Foden takes a corner kick in a match against Crystal Palace at Selhurst Park in London on March 11, 2023. (Photo by John Sibley/Action Images via Reuters)

M-Sport Ford World Rally Team push their Ford Puma Rally1 Hybrid car to the limits during the fifth round of the Rally Portugal 2023 in Porto on May 14, 2023. (Photo by Paulo Maria/DPPI/Rex Features/Shutterstock)

Serena Williams awaits a return with partner Venus Williams (not pictured) of the United States against Lucie Hradecka and Linda Noskova of Czech Republic during the Women’s Doubles First Round match on Day Four of the 2022 US Open at USTA Billie Jean King National Tennis Center on September 01, 2022 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Jamie Squire/Getty Images)

An old locomotive train that was used for transporting coal is preserved as a monument at Ny-Alesund, in Svalbard, Norway, October 11, 2015. A Norwegian chain of islands just 1,200 km (750 miles) from the North Pole is trying to promote new technologies, tourism and scientific research in a shift from high-polluting coal mining that has been a backbone of the remote economy for decades. (Photo by Anna Filipova/Reuters)

An African Penguin holds a Valentine's Day card at the California Academy of Sciences on February 13, 2013 in San Francisco, California. In honor of Valentine's Day, the colony of African Penguins at the California Academy of Sciences received heart-shaped red valentines with hand written messages from Academy visitors. (Photo by Justin Sullivan)

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!