Ten songs took part in the 2009 edition of DMGP, six of which were selected through an open call for entries, while the remaining four songs were by performers invited to take part by DR. The competing songs were revealed on 9 January 2009, after DR had narrowed down the best songs from the pool of submitted entries. A total of 684 songs were submitted to DR for 2009, an increase from the 443 songs that were submitted in the previous year.
During the DMGP, the ten selected songs competed in the first round of the contest where four songs selected by a 50/50 mix of jury and SMS voting progressed to a "knock-out" round in which the songs competed in pairs. A second round of SMS voting decided the two winning songs from each pair which went on to the final voting round where SMS voting selected the overall winner of the contest.
Controversy rose when the official album for the contest was released prematurely, due to a technical error. Set to be released the day before the contest, the album was released as a digital download due to a technical error made by the record label. 17 legal downloads were made before the album was taken off. One of the legal downloads, however, was uploaded onto YouTube as well as published as an illegal sharing file on the internet. My Way Music, the record company responsible for album, will take legal action against the person who illegally uploaded the songs onto the internet.
In the second round of voting, the four qualifiers competed against each other in pairs, with only two progressing to the final round. Hera Björk and Brinck passed to the Super Final, beating Sukkerchok and Johnny Deluxe respectively. In the Super Final, Hera Björk and Brinck sang their songs again, with SMS voting once deciding the overall winner. Dansk Melodi Grand Prix 2009 was won by Brinck and the song "Believe Again"
Since Denmark was not one of the "Big Four" nor the host of the 2009 contest, it had to compete in the second semi-final of the contest on 14 May. Brinck performed ninth in the running order of the semi-final, following Slovakia and preceding Slovenia, where he qualified Denmark to final of the contest, placing 8th. In the final, Denmark finished in 13th place with 74 points.