LaBelt (v) synonymous with the vocal technique "belting"; when (a woman) transfers her chest voice into a head voice range with strong projection and stability. For a singer to LaBelt a note they must be in their upper register (must be C6, C#6, and if they've got the chops a D6, Eb6, or E6) and able to hold said note until you get chills. (Some people known to LaBelt are Jennifer Hudson, Whitney Houston, Christina Aguilera, Mariah Carey...) It can sound amazing, or just loud as hell.
a concert or song can also be "LaBelle'd"
(adj) to give a memorable, stand-on-your-feet, bring you to tears or make you shout, LIVE performance that could only be experienced once in a lifetime. (Because this artist refuses to lipsync).
Girl #1: Oh my gosh, did you see J Hud singing Somewhere Over the Rainbow on that TV special?
Girl #2: Hell yeah I did! She LaBelted like 5 notes in that thing. My ears were still ringing the next morning!
Guy #1: My fiance loves Whitney Houston, so I took her to one of her concert last night in Tampa.
Guy #2: Oh, sounds nice, I'm more of a Britney Spears fan myself but...how was it?
Guy #1: How was it? How WAS IT?! Whit LaBelle'd that thing, are you kidding me?
Guy #2: What's LaBelle'd?
Guy #1: I can't just te--(shakes his head and sighs) You had to be there.