From Wikipedia: Schnuffel is an animated cartoon rabbit made at the end of 2007 by the German media company Jamba! for the marketing of one of its ringtones. The ringtone was turned into a song by Sebastian Nussbaum and Andreas Wendorf and recorded under the title Kuschel Song ("cuddling song"). The single was released in February 2008 and the ringtone rabbit made it immediately to the top of the German and European charts.
After the song went to the top of the Austrian charts and to number 2 in Switzerland, plans were made to release the song internationally. Translations in 10 languages and an album has been released.
In Germany the single "Kuschelsong" achieved Platinum status after more than 300,000 copies were sold.