Ha Ha
Ha Dong Hoon 河東勳 (Hangul 하동훈, born on 20th August 1979), better known by his stage name Haha河河 (Hangul  하하) or Haroro (하로로) is a German-born South Korean recording artist, actor, presenter and stand-up comedian. He is best known for being in the sitcom, Nonstop and for co-hosting the show, Running Man.
Life and career
2000–2008: Debut and rising popularity
Haha was born on 20th August 1979 in Berlin, Germany and moved to Seoul, South Korea when he was an infant. His parents are both Korean and he has a younger sister, Ha Juri (Hangul 하쥬리) who is also a singer. Haha graduated from Daejin University, where he got a Masters degree for Drama and Fine Arts. He later became a trainee for Seoul Records. He debuted as a singer and rapper in 2001 with boy band, Zikiri. Despite excessive promotion, Zikiri failed to gain popularity and was quickly disbanded.

In 2002, Haha became a co-host for the show, What's Up YO! alongside MC Mong and Jerome To. The three later became known as the "What's Up Trio" because of their strong friendship on-screen. Haha later joined the main cast of the third season of Nonstop, a sitcom about a group of college students and their friends and family. He remained part of the cast up until 2003 which managed to gain him recognition for his acting and comedy skills. Haha later became the producer and presenter for his own radio show with MC Mong, known as Haha and Mong's Journey in 2004 for SBS Power FM.

After leaving Nonstop, Haha spent two years alongside singer, Taw, preparing and recording his debut album titled, "The Beautiful Rhyme Diary". The album was released on 18th February 2005, alongside his debut single, "Love Song" but failed to chart or garner much popularity. In December 2005, Haha became a member of the game show, Infinite Challenge. He also returned as a guest for the sixth and final season of Nonstop in 2006. In 2007, Haha released his second single, "You're My Destiny" which took a samples from the song "Stand By Me" by Ben E. King. The single managed to reach number one on the Gaon Chart and he performed on his Comeback Stage on Music Bank in November. Haha later joined the show, Happy Shares Company as a co-host until February 2008.

2008–present: National service and Running Man
In February 2008, Haha temporarily left Infinite Challenge in order to serve his national service for the army. Previous reports had stated that he had been attempting to evade his military service however, these reports were confirmed to be false and Haha's service had only been postponed. During his service, he collaborated with a new group Davichi in their song "Love and War". After 24 months of serving the military, on 11th March 2010, he was discharged from the military.

After finishing his duty, Haha returned to Infinite Challenge. He also made regular guest appearances on Yu Jae-seok's talk show Come to Play and was the co-host of the Haha-Mong Show with MC Mong up until allegations had sprung up that MC Mong had attempted to evade his military service. Since 2010, Haha is one of the co-hosts for the variety show Running Man, with host-in-chief Yu Jae-seok. On 30th December  2011, Haha received the award for "Best Entertainer" during the 2011 SBS Entertainment Awards for his work on Running Man. He also performed his single, "Rosa" during the award ceremony.

Haha recently tied the knots with his beautiful bride Byul. This ended his "finding his last love" on the show whenever female guests appears in the show.
Discography
Albums
The Beautiful Rhyme Diary - Released  18th February 2005
Quan Ninomarley A.K.A Haha Reggae Wave - Released 14th September 2011

Singles
2005 : "Love Song" The Beautiful Rhyme Diary
2007 : "You're My Destiny" Non-album release
2008 : "It's 7 Years" (with Taw and MC Mong)
           "That's Right, I Can't Sing"
2010 : "A Bottle of Liquor" (with Tiger JK)
           "You're My Destiny 2"
2011 : "Rosa" Quan Ninomarley A.K.A Haha Reggae Wave
           "Sae Song"

Filmography
Films
2005 : Love in Magic Park Dong Sun - Supporting role
2006 : My Boss, My Teacher Jin Soo - Lead role
Who Slept with Her? Ahn Myeong Seop - Lead role
Holy Daddy Ha Dong Hoon Lead role; Credited as Ha Dong Hoon
2007 : The Friends Halibut - Supporting role
Happily N'Ever After Mambo Lead role; Korean dub voice-over

Television
2002–03 : What's Up YO! Co-host Mnet Alongside MC Mong
Nonstop HaHa MBC Lead role; Season 3
2005–08 : Infinite Challenge Co-host MBC Joined cast in December 2005 and left in February 2008 to serve his National Service.
2006 : Nonstop HaHa MBC Guest role; Season 6
2006–07 : X-Man Himself SBS Frequent guest appearances
2006–08 : Music Bank Host KBS2 Left in February 2008 to serve his National Service.
2007 : Yi San Public Official MBC Guest role
2007–08 : Happy Shares Company Co-host MBC Left in February 2008 to serve his National Service.
2008 : Music Bank Himself KBS2 Performed single, "You're My Destiny"
2010 : Haha-Mong Show Co-host SBS Alongside MC Mong
2010– present : Infinite Challenge Co-host MBC Returned to cast in March 2010; Currently airing
Running Man Co-host SBS Currently airing
2011 : Music Bank Himself KBS2 Performed single, "Rosa"