I mean in 'Poppy version' & 'Bridget version' because both of them sat up & sang a line from some song in different circumstances. Two different songs: first Poppy sat up when Branch saved her life after the Spiders Attack on her way to Bergen Town & sang a line from 'I will get back up again' as soon as she regained her consciousness - & some time later Bridget sat up & sang a line from 'Hello - is it Me you're looking for?' when she woke up for a moment when Trolls were in her room. 

What was the purpose of those two scenes? - To make it Funny, I guess, because in My Opinion those scenes Were funny from the Viewer's Point of view ( & Poppy's version was even Funnier, I guess!  ^_~ )