Yes, something like "lérigôu", the word "let" being followed by a wavel has an "r" sound, it happens usually with "it".
Same happens here, in this song.https://www.youtube.com/watch?v=L0MK7qz13bU
at 01:05 m.
In the Beatles song, the sound is ''léribi", let it be. This happens when someone speaks or sings it in the same breath, fast.
I hope it helps.