His musical career took off in 1994 as one of the original team members of the now-legendary Cheiron Productions, meeting great international success working with Boyzone, Britney Spears, Westlife and the Backstreet Boys.
Shortly after Cheiron decided to shut down its studios in 2000, Per together with David Kreuger formed A Side Productions, having continued to produce and write songs for major artists such as Il Divo, Céline Dion, Josh Groban, Shayne Ward and Paul Potts.
His interest in music was developed already while attending primary school, picking up the cello as his main instrument playing it for the next ten years.
As a teenager, Per played both the guitar and keyboards in different local bands, but eventually decided to focus on producing, arranging and writing music.
Successfully working with a wide range of artists for the next couple of years, the tandem's greatest prosperity that far came in 1998, co-writing and producing the song "Will Be Yours" for Boyzone's third consecutive UK No 1 album Where We Belong.
But in August 1998 Cheiron shocked the music world sending out a press release that its leader Denniz PoP had died.
Westlife had approached Cheiron for material to their upcoming self-titled debut album and the duo co-wrote three songs which they also produced.
Including the tandem's productions of "It's True" and "The Answer to Our Life", the record became another huge international success selling more than 12 million copies.
Located in the center of Stockholm, the duo soon embarked on several major projects including working on Westlife's third album World of Our Own.
Released in March, Gareth Gates knocked his rival off the No 1 spot, subsequently holding his position for four weeks straight.
The quartet's self-titled debut album was scheduled for release in the fall of 2004 and one of its first destinations was A Side Productions' studios for recordings.
Including the productions of Ennio Morricone's "Nella Fantasia" and "Ti Amerò", which Per and David also had co-written exclusively for the group, the album Il Divo was released in the UK on 6 November.
[19] In 2005 Céline Dion started working on a new album, her first French compilation titled On Ne Changes Pas, including three new songs.
Dion's album was released on 3 October and reached No 1 in Quebec, Belgium and France where it held the position for seven weeks straight subsequently spending an entire year on the chart.
In the second season finale, aired on 17 December, 2005, Shayne Ward was crowned winner after performing the newly written song "That's My Goal".
2007 and with first week sales exceeding 128,000 copies Potts shot straight to No 1[25] outselling the rest of his Top 10 rivals combined.
[27] Per and David were in 2007 involved in several other projects including working with Katherine Jenkins, the Welsh award-winning and best-selling classical crossover superstar.
[28] By the end of 2005, as the first singer in musical history, Jenkins simultaneously held the number 1, 2 and 3 positions in the UK's Classical Chart with her three albums.
With sales surpassing 375,000 copies in its first week of release, Spirit is the fastest selling British debut album of all time.
[34] Re-released in the UK almost exactly one year later, on 17 November, 2008, Lewis' Spirit The Deluxe Edition bounced back to the top of the charts[35] to give Per and David a second consecutive No.