Kristen Bell has apologised to parents for getting ‘Let It Go’ from ‘Frozen’ “stuck in their head”. The 44-year-old actress starred in the Disney musical movie as Anna, and while she considers herself “very, very lucky” to have been a part of such a big cinematic hit, she admitted she’s had to say sorry to parents for the earworm song. She told People magazine: “I’ve apologised to a few parents for getting those songs stuck in their head, but I consider myself very, very lucky to be a part of that juggernaut.” ‘The Good Place’ star added several people still didn’t know she had sang in the ani…