He's singing his heart out for five minutes.
Or on stage - singing his heart out.
Let's talk somewhere privately while your relation sings her heart out about that horrible river.
Thank you to Jason who put everything together, and of course sang his heart out on this track!
Nuno was alone on stage throughout the whole song just singing his heart out.
Swallow had the harpsi-thingy set up right here in the Hall and she sang her heart out for two hours solid.
You go to the Palace and sing your heart out.
For a split second it crosses my mind that he might literally sing his heart out.
No serious complaint, at any rate, about the simple but magical Intermezzo, which was allowed to sing its heart out.
It was the kind of tune that had the emotion that she could get into and sing her heart out.