# Merry & Happy

Merry & Happy is the reissue of South Korean girl group Twice's first studio album, Twicetagram. The Christmas-inspired album was released on December 11, 2017. In addition to the original track listing, it has two new songs: the first track is titled "Heart Shaker" and the eponymous second track "Merry & Happy" was written by Park Jin-young. The album and "Heart Shaker" debuted at No. 1 on four charts of Gaon—Album Chart and Digital Chart, Download Chart and Social Chart respectively, while "Merry & Happy" entered and peaked at No. 24 on Digital Chart.
Twice performed both "Heart Shaker" and "Merry & Happy" on music programs—Music Bank, Show! Music Core and Inkigayo on December 15–17, respectively. The music video of "Merry & Happy" was set for release on December 21, but was delayed until the next day out of respect for Shinee's Jonghyun, whose burial service was held on December 21.

## Content production

Credits adapted from album liner notes.

### Personnel

* J. Y. Park "The Asiansoul" – producer
* Lee Ji-young – direction and coordination (A&R)
* Jang Ha-na – music (A&R)
* Kim Yeo-joo (Jane Kim) – music (A&R)
* Park Sun-hyeong – music (A&R)
* Kim Ji-hyeong – production (A&R)
* Choi A-ra – production (A&R)
* Kim Je-na (Jenna Kim) – production (A&R)
* Gong Da-yoon – production (A&R)
* Kim Bo-hyeon – design (A&R)
* Kim Tae-eun – design (A&R), web design, album art direction
* Choi Hye-jin – recording, mixing and assistant mixing engineer
* Eom Se-hee – recording and assistant mixing engineer
* Jang Han-soo – recording and assistant mixing engineer
* Friday of Galactika – recording engineer and chorus (on "Heart Shaker")
* Jowul – recording engineer, vocal producer (on "Merry & Happy"), vocal director and background vocals (on "24/7")
* Jeong Ho-hyun – recording engineer, all instruments and keyboard (on "Turtle" and "You in My Heart")
* Earattack – recording engineer, and all instruments and computer programming (on "Missing U" and "Rollin'")
** bass (on "Missing U"), background vocals (on "Rollin'") and director (on "Don't Give Up")
* Jeong Gyu-chang – recording engineer
* Kevin Oppa (mr. cho) – recording engineer, vocals producer (on "Love Line"), computer programming, piano and digital editing (on "Jaljayo Good Night")
* Frants – recording engineer, all instruments and computer programming (on "Look at Me")
* Tony Maserati – mixing engineer
* James Krausse – mixing engineer
* Lee Tae-seob – mixing engineer
* Lim Hong-jin – mixing and assistant mixing engineer
* Staytuned – mixing engineer
* Yoon Won-kwon – mixing engineer
* Jossi Ahjussi – mixing engineer
* Jeon Bu-yeon – assistant mixing engineer
* Bae So-yoon – assistant mixing engineer
* Park Jeong-eon – mastering engineer
* Chris Gehringer – mastering engineer
* Kwon Nam-woo – mastering engineer
* Naive Production – video director
* Kim Young-jo – video executive producer
* Yoo Seung-woo – video executive producer
* Choi Pyeong-gang – video co-producer
* Kim Young-joon at Agency SEED – photographer
* Kang Hye-in at Normallogic – album design
* Kang Hye-in at Normallogic – album design
* Choi Hee-seon at F. Choi – style director
* Son Eun-hee at Lulu – hair and makeup director
* Jung Nan-young at Lulu – hair and makeup director
* Choi Ji-young at Lulu – hair and makeup director
* Jo Sang-ki at Lulu – hair and makeup director
* Zia at Lulu – hair and makeup director
* Jeon Dal-lae at Lulu – hair and makeup director
* Won Jung-yo – makeup director
* Yoon Hee-so – choreographer
* Kang Da-sol – choreographer
* Today Art – printing
* David Amber – all instruments, computer programming (on "Heart Shaker")
* Avenue 52 – all instruments, additional programming (on "Heart Shaker")
* Galactika – vocal director (on "Heart Shaker")
* e.Na – chorus (on "Heart Shaker")
* Joe Lawrence – all instruments, computer programming (on "Merry & Happy")
* Jihyo of Twice – background vocals (on "Merry & Happy", "Likey", "Ding Dong" and "Love Line")
* Nayeon of Twice – background vocals (on "Merry & Happy" and "Likey")
* Kim Cho-young – background vocals (on "Merry & Happy")
* Rado – all instruments, computer programming and background vocals (on "Likey")
* Choi Hoon – bass (on "Turtle" and "You in My Heart")
* Yoon Tae-woong – guitar (on "Turtle" and "You in My Heart")
* Kim Yoon-ji – chorus (on "Turtle")
* Kim Jong-seong – guitar (on "Missing U")
* Nam Joo – background vocals (on "Missing U", "FFW" and "Rollin'")
* Jeong Yoo-ra at Cassette08 – digital editing (on "Missing U", "Rollin'" and "Don't Give Up")
* Jeong Dong-hwan & Park Ji-yong & Nusoul – keyboards (on "Wow")
* Kriz – background vocals (on "Wow")
* Park Gi-tae – guitar (on "Wow")
* NAOtheLAIZA – all instruments and computer programming (on "FFW")
* Antti Hynninen – all instruments and computer programming (on "Ding Dong")
* Caesar & Loui – all instruments and computer programming (on "24/7")
* Oh Han-sol – background vocals (on "Look at Me")
* Hyerim – background vocals (on "Look at Me")
* Fox Stevenson – all instruments and computer programming (on "Rollin'")
* Bin – background vocals (on "Rollin'" and "Don't Give Up")
* Darren Smith – all instruments and computer programming (on "Love Line")
* Chris Wahle – all instruments and computer programming (on "Don't Give Up")
* Kim So-ri – chorus (on "You in My Heart")
* Kim Jun-soo – guitar (on "Jaljayo Good Night")
* Lee Da-jeong – background vocals (on "Jaljayo Good Night")

## Accolades

| Year | Award | Category | Result | Ref. |
| 2018 | 1st Korea Popular Music Awards | Best Album | Nominated | |

## Release history

Release dates and formats for Merry & Happy :
| Region | Date | Format(s) | Label | Ref. |
| Various | December 11, 2017 | Digital downloadstreaming | JYP | |
| South Korea | December 12, 2017 | CD | JYP | |