[1] The book Little Pink and the Motley Crew (Swedish: En liten skär och alla bråkiga brokiga) (2014) was controversial for Wirsén's illustrated depictions of the Black girl character named Lilla Hjärtat (English: Little Heart), who has resemblance to an American derogatory caricature of a "pickaninny" or "golliwog" and who was supposed to have acted "uncontrollable".
[1][3] The backlash of claims of racism started on social media, and was later picked up by the Swedish news.
[3][4] Wirsén announced in the news in November 2012, she would discontinue the Lilla Hjärtat character.
[4] Wirsén is married to Swedish graphic designer and art director Pompe Hedengren.
books were made into an animated series in 2010 and are regularly broadcast on Sveriges Television.