M2M were frequently praised for writing most of their songs and performing their own instruments, something which was considered to set them aside from the majority of teen pop music artists.

Their debut single, "Don't Say You Love Me" (1999), was both a critical and commercial success, and remained their biggest hit.

Despite critical acclaim, their second album, The Big Room (2001), did not perform as well commercially, and the duo broke up in 2002, with each pursuing a solo career.

[8] The two girls formed a music duo when they were eight, naming it "Hubba Bubba" after their favourite bubble gum.

[12] Promoted by a "nonstop marketing effort", advanced airing on Radio Disney and the affiliation with Pokémon, the single experienced commercial success.

[13][14][15] Additionally, it was certified Gold in both Australia[16] and America,[17] and was nominated for the year's best song at the 2000 Spellemannprisen awards.

[26] Their performance was recorded and appeared on an episode of Disney Channel in Concert on 29 April, which focused on both M2M and BBMak.

[29] In September that year, they toured the United States with Hanson,[30][31] performing as the bands' opening act.

[30] In early 2001 they were featured in Atlantic Records' "Teensation" TV concerts, which were designed to promote "rising stars".

[41] Despite The Big Room being critically acclaimed, it was not as commercially successful as their first album, which Verdens Gang attributed to a lacklustre promotion campaign by Atlantic Records.

[42] Halfway through their tour with Jewel in mid-July, M2M were removed as the opening act by Atlantic, who cited disappointing sales of The Big Room, which at that time had sold around 100,000 units in America.

[45] Interviewed in 2013, Raven said that she and Larsen had always agreed they would keep performing together as long as they were having a good time, and they ended because it was not fun anymore, also saying that while they had been inseparable as children, as 18-year-olds they had become quite different.

[49] In 2006, she featured with Meat Loaf on a cover of the song "It's All Coming Back to Me Now", which found international success including reaching No.

[56][57] M2M wrote many of their own songs and played their own instruments, even when performing live,[25] which is considered rare among teen pop artists.

[21][58] In 1999, Ron Shapiro from Atlantic Records said "What was extraordinary about them from the beginning was that they had an incredibly accessible pop sound and contemporary visual for what's happening today, coupled with a truly organic songwriting, and musical instrument prowess ...

[7] That same year Stephanie McGrath from AllPop.com said M2M's music "breathes fresh, brusque Norwegian air into the world of pop music dominated by Britney Spears wanna-bes and Orlando-born boy bands", noting that instead of typical teen subjects like true love or candy, M2M's songs were about "taking things slow or not betraying your friends".

[59] Reviewing Shades of Purple, Michael Paoletta from Billboard said the album's tracks showed a "seasoned singing style that is, quite frankly, the antithesis of teen sensations like Britney Spears", concluding "Beautifully sun-kissed, Shades of Purple is poised to be the soundtrack of spring/summer 2000.

[61] Commenting on The Big Room, Karen Tye from the Herald Sun praised M2M for using "down-to-earth tunes and thoughtful lyrics" instead of revealing outfits to propel them into the limelight, unlike many of their pop counterparts.