Another 'identify this movie' query

I posted this on “another board,” and didn’t get a definite answer, but here goes:

I’ve seen only the previews, and in the past month or so. The only scene that I can remember is of some blondish gal holding a cigarette doing some awful singing into a microphone (possibly karaoke?), while a guy (her boyfriend/SO/fiance?) looks on in shock, as he walks in on her.

Any ideas???

Just a WAG, but could it be “Duets” as it’s due to be released in video/DVD May 8th? Did the blonde look like Gweneth Paltrow?