Rebecca seems to have really gotten into singing along with her bedtime songs.
She can nail the first couple words of each phrase, with various word like sounds incorporating many correct consonant sounds for the rest.
Twinkle Twinkle Little Star
How a munder war uaaaah
Up Above lalurd so aye
Like a dimoh ima tie.
The cool part is that she is often in tune, and is definitely getting the rhythm correct.
Also, during the day, when doing her 'flashdance' dancing (also known as the 'Snoopy dance') she has started to keep passable rhythm with her feet.