Fontana co-wrote the 2011
Justin Bieber song "Home This Christmas" with
Nasri Atweh. It was featured on Bieber's Christmas album
Under the Mistletoe. Also in 2011, Fontana co-wrote the original theme song to
Shelter Me, a
PBS show, hosted by
Katherine Heigl that celebrated the human-animal bond. The series focuses on shelter animal success stories. The theme song, "Love is Everything (Shelter Me)," was written by
Austin Bis, Fontana and Daniel Walker, and performed by Fontana. In 2014, she co-wrote the song "Hit Me Up" with Lars Hustoft and Jon Asher for
Eurovision Song Contest competitor Charlie Tepstad of Norway. On April 5, 2013, the song "Nothing Really Matters" by
tyDi, which Fontana was featured on and was co-written by STIX of
Fly Panda, debuted on
Billboard. It reached number 39 on the
Billboard Dance Club Songs chart in 2013. Also in 2013, Fontana worked as a songwriting consultant on Norway's
Idol television show, co-writing
Astrid S's single "Shattered", which went Gold in Scandinavia. In 2015, Fontana, alongside tyDi, topped the
Mediabase dance charts at Number 1 with their EDM track "Redefined", co-written by Priya J. Geddis. In 2016,
Britney Spears released the Japanese edition of her album
Glory, including a song written by Fontana with Jon Asher and produced by
DJ Mustard, titled "Mood Ring". Fontana had three Top 10 singles stemming from the Korean
Mnet TV show
Produce 101: "Crush", "Yum Yum" and "Fingertips". On April 1, 2016,
Aaron Carter released "Fools Gold" which was co-written by Fontana, Carter, Asher, Taylor Hegelson and Michel "Lindgren" Schulz. Fontana co-wrote all five tracks on Carter's 2017 comeback EP
LøVë. On October 7, 2016,
Daya released
Sit Still, Look Pretty, which included two songs penned by Fontana, "Words" and "All Right". She co-wrote
The Chainsmokers single "
Setting Fires", released in November 2016, and the
BTS single "
Euphoria", released in April 2018, which reached number 2 on the
Billboard World Digital Songs chart. She and her husband Michel "Lindgren" Schulz helped write the 2019 BTS single "
Boy with Luv" featuring
Halsey, which was the fastest
YouTube video to reach 100 million views (doing it in under two days). Fontana is managed by Justin Garza. Alongside Lindgren, she co-wrote "
Takedown" for the
soundtrack of the 2025 animated film
KPop Demon Hunters, which was performed by
Ejae,
Audrey Nuna, and
Rei Ami as the fictional K-pop girl group Huntrix, as well as by
Jeongyeon,
Jihyo, and
Chaeyoung of
Twice. == Production credits ==