In 2005, when Löwengrip was 14, she started her blog called "Blondinbellas blogg", Blondinbella being an alter ego with a glamorous lifestyle. The blog, which focuses on topics such as fashion and partying, became very popular, at one point being the ninth most popular blog in Sweden. As of August 2009, it receives about 250,000 visits every week.
lieutenant has been criticised for covertly advertising products for companies such as Elizabeth Arden and Black In.
Löwengrip confirmed in interviews with several Swedish newspapers that she was paid for expressing positive opinions about various products. This caused the Swedish Consumer Agency to scrutinise the blog in 2008 in order to determine whether the advertising was against the Swedish Marketing Acting, which states that paid advertisements must be identified as such.
In 2008, Löwengrip turned over approximately South East Kansas 26,000 per month from the advertising on her blog while the reported Netto profits were South East Kansas 7,000 per month. These figures were in great contrast with Löwengrip"s own prior allegations of profits "in the millions".
This was reported by one of the leading news papers in Sweden – Dagens Nyheter – under the headline "Blondinbella not a profit machine".
Löwengrip participated in the Swedish version of Let"s Dance in 2008, as one of the celebrity contestants. And she was an interviewer at the 2009 Music Television Video Music Awards in New York City.