Question: Are Marie Fredriksson and Oliver Sykes both singers?

Context articles: Oliver Sykes
The Heartland Café
Sparvöga
Efter stormen (song)
Äntligen (song)
Min bäste vän
Ännu doftar kärlek
Äntligen – Marie Fredrikssons bästa 1984–2000
Marie Fredriksson
Tid för tystnad

Oliver "Oli" Scott Sykes (born 20 November 1986) is an English musician, best known as the lead vocalist of the band Bring Me the Horizon.
 He also founded the apparel company Drop Dead clothing.
 Sykes has also created the graphic novel "Raised By Raptors" with Drop Dead Clothing artist Ben Ashton-Bell.
The Heartland Café is an album released by Swedish pop group Gyllene Tider on 17 February 1984.
 The group's first recorded foray into the English language, "The Heartland Café" was the second album to feature vocalist Marie Fredriksson singing back-up and proved to be a precursor to the Swedish super-duo Roxette, which consists of Fredriksson and Gyllene Tider's lead singer, Per Gessle.
 The album peaked at No. 18 on the Swedish albums chart.
Sparvöga is a 1989 single by Swedish artist Marie Fredriksson, known internationally from the duo Roxette.
 The single was not originally part of an album, but was written for the TV-series "Sparvöga", which in turn was based on Ann-Charlotte Alverfors's book by the same name.
 The single was released in March 1989, and the next month peaked at number six on the Swedish charts.
 As such it was Fredriksson's highest charting single ever until the release of "Där du andas" in 2008, that reached the number one spot.
Efter stormen is an autumn-themed pop song written by Marie Fredriksson and Lasse Lindbom, and recorded by Marie Fredriksson on their 1987 album with the same name.
 The song was also released as a single, with "Varmt och djupt" as B-side.
Äntligen is a song written by Marie Fredriksson and Mikael Bolyos, and recorded by Marie Fredriksson on the album "Äntligen" in the year 2000, as well as released as a single the same year.
Min bäste vän "(My best friend)" is the seventh solo album by Swedish pop singer and songwriter Marie Fredriksson, her sixth album in Swedish.
 On the album, Marie Fredriksson gives her own, personal interpretation of the music she grew up with during the 1960s and 1970s.
Ännu doftar kärlek is a song wity lyrics by Marie Fredriksson and music by Marie Fredriksson and Lasse Lindbom.
 Marie Fredriksson scored a 1984 hit with the song on her debut album "Het vind".
 Lasse Lindbom also recorded it, and released it as a single with Nane Kvillsäter the same year.
Äntligen – Marie Fredrikssons bästa 1984–2000 "(Finally – Marie Fredriksson's best)" is the first greatest hits album by Swedish pop singer and songwriter Marie Fredriksson.
 Compiled by Marie herself from some personal favourite songs and from solo singles that were released between 1984 and 1997.
 Two new songs were specially recorded to be included on the album, "Äntligen" and "Det som var nu" (a duet with Patrik Isaksson).
Gun-Marie Fredriksson, known as    (born 30 May 1958), is a Swedish pop singer-songwriter and pianist, best known for forming one half of the pop rock duo Roxette, which she created together with Per Gessle in 1986.
 She and Gessle achieved international success from the late 1980s to the early 1990s with a total of six top 10 US hit songs such as "It Must Have Been Love," "Listen to Your Heart," "The Look," "Joyride," and "Dangerous."
 In 2002, after fainting at home, she was diagnosed with brain cancer.
 During her rehabilitation she continued to make music, resulting in the album "The Change."
 She later reunited with Gessle to record more Roxette albums, embarked on worldwide tour and continued to record as a solo artist in her native Sweden.
Tid för tystnad – Marie Fredrikssons ballader "(Time for silence – Marie Fredriksson's ballads)" is the second compilation album by Swedish pop singer and songwriter Marie Fredriksson, made of personal favourites among her previously recorded ballads.
 Features two newly recorded songs: "Ordet är farväl" and "Ett bord i solen" (Swedish version of "A Table In The Sun" from the album "The Change".