original: While collaborating with Mylène Farmer and Laurent Boutonnat, Alizée released two albums — both of which were hits inside and outside of France.
simplifications: While working with Mylène Farmer and Laurent Boutonnat, Alizée released two albums.  Both albums were hits inside and outside of France. Whie Alizee cooperated with Mylene Farmer and Laurent Boutonnat, she released two albums that were popular in and out of France. While working with Mylène Farmer and Laurent Boutonnat, Alizée released two popular worldwide albums. Alizée released two albums with Mylène Farmer and Laurent Boutonnat. Both were hits inside and outside of France. Alizée released two albums — both of which were hits inside and outside of France. While working with Mylène Farmer and Laurent Boutonnat, Alizée released two albums. Both were hits inside and outside of France. While working with Mylène Farmer and Laurent Boutonnat, Alizée released two albums. Both were hits inside and outside France. Alizee released two albums with Mylene Farmer and Laurent Boutonnat. Both were hits. While working with Mylene Farmer and Laurent Boutonnat, Alizee put out two albums that were popular in and out of France. Alizée collaborated with Mylène Farmer and Laurent Boutonnat while two released albums became hits in and out of France.