Another song at the end of You Do Or You Don't??

[moon]

Hi! I've been listening to OOTC recently (of course, something common on me haha) and I noticed that Lindsey sings something (murmures? don't know if it's the correct word) at the very end of You Do Or You Don't. I also noted that this little fragment belongs to another older song, which is instrumental and uses to sound on some videos I've seen recently, specially on Instagram. I even heard it on a documentary about Ferrari.
Do you know which song is it?
Thank you so much!