Question: Are both ZZ Ward and Tove Lo musicians?

Context articles: List of songs written by Tove Lo
Cool Girl
Scars (Tove Lo song)
Tove Lo discography
Habits (Stay High)
ZZ Ward
Queen of the Clouds Tour
Tim Erem
Close (Nick Jonas song)
Tove Lo

Swedish singer and songwriter Tove Lo has written over 70 songs for her two studio albums and one extended play, as well as for other artists.
 Between 2006 and 2009, Lo was a member of math rock band Tremblebee, and wrote the lyrics for their songs.
 In 2011, she signed a publishing deal with Warner/Chappell Music, and later joined songwriting teams Xenomania and Wolf Cousins.
 In 2014, Lo wrote and provided vocals for "Heroes (We Could Be)" by Swedish musician Alesso, which peaked inside the top ten in Sweden and the United Kingdom.
"Cool Girl" is a song by Swedish singer and songwriter Tove Lo.
 It was written by Lo with the record production duo Jakob Jerlström and Ludvig Söderberg, AKA The Struts, who produced the track.
 "Cool Girl" was released for download by Island Records on 4 August 2016 as the lead single from Lo's second studio album, "Lady Wood".
 The song peaked at #15 in Sweden the week after its release.
 The music video premiered on 19 August 2016.
"Scars" is a song by Swedish singer and songwriter Tove Lo, released as the lead single of the soundtrack of the 2016 film "" on February 19, 2016.
 It was written by Lo, along with Jakob Jerlström and Ludvig Söderberg; the latter two also produced the song.
 Lo had previously collaborated with both on her debut studio album, "Queen of the Clouds".
Swedish singer and songwriter Tove Lo has released two studio albums, one extended play (EP), nineteen singles (including seven as a featured artist), three promotional singles and fifteen music videos. Lo started her career as the lead singer and songwriter in math rock band Tremblebee from 2006 until 2009.
 In 2011, she signed a publishing deal with Warner/Chappell Music, and started recording songs.
 She self-released "Love Ballad" as her debut single in October 2012.
 The next year, Lo released "Habits", which received positive feedback from music blogs and led her to sign a record deal with Universal Music Group.
 Lo's first EP, "Truth Serum", was released under the label on 3 March 2014, and entered the top 20 in Norway and Sweden.
 Three singles were released from the EP, including a remixed version of "Habits" by production duo Hippie Sabotage, re-titled as "Stay High".
 The track peaked at number 13 in Sweden and reached the top ten of the charts in Australia, New Zealand, and the United Kingdom.
"Habits (Stay High)" is a song recorded by Swedish singer Tove Lo from her debut extended play (EP), "Truth Serum", and her debut studio album, "Queen of the Clouds" (2014).
 It was written by Lo with Ludvig Söderberg and Jakob Jerlström, while it was produced by the latter two under the production name The Struts.
 Initially, the singer self-released the song under the title "Habits" on 25 March 2013 as her second independently-released single.
 After Lo was signed to Universal Music, the track was re-released on 6 December 2013 under the title of "Habits (Stay High)" as both the second single from "Truth Serum" and the lead single from "Queen of the Clouds".
 Musically, it is a pop and electropop song which features a minimal and upbeat electronic instrumentation.
 Its lyrics delve into the singer's attempts to forget her previous boyfriend through substance abuse, drinking and other hedonistic practices.
 Consequently, some critics and Lo herself noted a contrast between the song's production and its lyrical content.
ZZ Ward (born Zsuzsanna Eva Ward; June 2, 1986) is an American musician, singer and songwriter.
 She is signed to Boardwalk Entertainment Group and Hollywood Records, and managed by E. Kidd Bogart's Boardwalk Music Group.
The Queen of the Clouds Tour is the first headlining concert tour by Swedish recording artist Tove Lo in support of her debut studio album, "Queen of the Clouds" (2014).
 The tour was officially announced nine months after the release of the album, on June 22, 2015.
 The tour began on September 28, 2015 in San Diego at the North Park Theatre and was scheduled to conclude on November 14, 2015 in Tove Lo's home city of Stockholm, Sweden with a total of twenty shows over the span of three months.
 Unfortunately due to illness Tove Lo was forced to cancel the four European dates on her tour.
Timothy Frey Trond Erem, better known as Tim Erem, (born 29 October 1990) is a Swedish director from Lidingö, Stockholm.
 He is best known for directing and writing music videos for artists such as Rihanna, Drake, Tove Lo, Elliphant, Katy Perry, MØ and Major Lazer.
 Erem's music video for "Lean On", by Major Lazer and MØ, is the eighth most viewed video on YouTube.
 Erem is a part of the production company Diktator, which includes other reputable directors such as Daniel Espinosa and Andy Milonakis.
 He has directed the short film "Fairy Dust" where Swedish artist Tove Lo masturbates.
 The video he directed for "Work" by Rihanna and Drake was nominated for Best Female Video at the MTV Video Music Awards.
"Close" is a song recorded by American singer Nick Jonas from his third studio album, "Last Year Was Complicated".
 The track features guest vocals from Swedish singer Tove Lo.
 It was released on March 25, 2016, by Island, Safehouse and Republic Records as the album's lead single.
 The song was written by Robin Fredriksson, Mattias Larsson, Julia Michaels, Justin Tranter, and Tove Lo.
Ebba Tove Elsa Nilsson (born 29 October 1987), known professionally as Tove Lo ( , ] ), is a Swedish singer and songwriter.
 She was born and raised in the affluent Djursholm district of Danderyd Municipality, just north of Stockholm, where she graduated from musical magnet school "Rytmus Musikergymnasiet".
 She formed the Swedish rock band "Tremblebee" in 2006.
 Following the disbanding of Tremblebee, she pursued a career in songwriting and earned a publishing deal with Warner/Chappell Music in 2011.
 Working with producers Alexander Kronlund, Max Martin, and Xenomania, she became a successful songwriter recording and independently releasing her own compositions.
 In 2014, she was signed to Max Martin's songwriting collective Wolf Cousins and was offered a recording deal.
 She signed to the American label Island and Polydor Records in the UK.