News wrote that because she was no longer grouped with fellow young female singer-songwriter-instrumentalists Avril Lavigne and Michelle Branch, Carlton had a challenge "to balance her artistic credibility with a fanbase built upon TRL appeal." Carlton described herself as alternative to the popular mainstream hip hop and pop artists, such as Jessica Simpson and her sister, Ashlee. According to Ron Fair, a key element in the promotion of the album was radio airplay for "White Houses", which was released to radio in late August 2004. Its airplay slowly increased afterwards, and it did not enter the U.S. Billboard Hot 100 until October, peaking at 86 in early November. In early October, Carlton opened for alternative rock band The Calling on their short tour of Brazil, and a performance she recorded for Sessions@AOL was aired over the Internet. Later that month, Carlton travelled to Japan to promote the album there. To support the album, Carlton embarked on a North American concert tour, which began on October 21 in Minneapolis, Minnesota and concluded on November 21 in Portland, Oregon; her opening act was pop rock band Low Millions. She said the tour would be "just me and the piano" and "totally stripped down, like an in-your-living room-type of feeling, that type of intimacy." She recorded a cover of the Kai Winding song "Time Is on My Side" (1963) for a Time Warner digital video recorders commercial, which also served as promotion for Harmonium and received heavy rotation on U.S. television during early 2005. The newspaper Metroland wrote, "we tend to think time is most definitely not on her side — how else to explain the near-universal apathy to the release of [Harmonium]?" Harmonium was not re-issued to include the song. Carlton was quoted in a March 2005 interview with Fly Magazine as saying it was "difficult" for someone like her, a singer-songwriter who played the piano, to "reach a lot of people", but that "depending on what happens with the second single, I think it will do really well. I hope the record goes gold and all those things." A second tour, with Cary Brothers and Ari Hest as support acts for many of the shows, ran from March 9 (in Atlanta, Georgia) to April 30 (in Plattsburgh, New York). In April and May 2005, songs from Harmonium were featured on the WB teen soap operas Charmed and One Tree Hill, and