light-heartedly
adverb /ˌlaɪt ˈhɑːtɪdli/
  /ˌlaɪt ˈhɑːrtɪdli/
- in a way that is intended to be fun rather than too serious- The film light-heartedly compares the two men.
 
- in a way that shows somebody is cheerful and not worried- She spoke light-heartedly.