If Best Buy (NYSE: BBY) invites you to karaoke, don earplugs and run the other way.

The consumer electronics giant is unloading its Napster music subscription service on rival Rhapsody. Best Buy will receive a minority stake in the company after handing over Napster's subscribers and other assets.

Do you think that Best Buy is finally getting the hint? It doesn't belong in the music business. The chain may as well be I Love Lucy's namesake comedic damsel, always trying to get into hubby Ricky Ricardo's musical act despite the lack of talent.

"But Ricky," she would whine, "can I be in your show?"

Lucy Ricardo was always denied the opportunity and paid the price when she would try to scheme her way into the musical spotlight.

Best Buy is the same way. It blew it with Musicland, figuring that it could make retail CDs thrive just as the platform was peaking a decade ago. It then went for the wrong horse -- in the wrong race -- when it snapped up Napster.

At least Best Buy got a good deal on Napster, paying just $122 million three years ago. Napster had more than half that sum in cash and short-term investments, making Best Buy's final out-of-pocket price considerably less than that.

However, just as RealNetworks (Nasdaq: RNWK) and Viacom's (NYSE: VIA) MTV spun off Rhapsody last year, companies are discovering that it's hard to turn a profit with music subscription services. After all, if this was a lucrative niche, don't you think that Apple (Nasdaq: AAPL) would be all over this? Companies like Microsoft (Nasdaq: MSFT) with its Zune Pass that are keeping music services going as a differentiator to iTunes may be missing the point about this just not being a viable business.

Pandora (NYSE: P) and Spotify have disrupted the model with ad-supported freebies. There are limitations, but music fans don't seem to mind, judging by the companies' booming growth.

So please, Best Buy, put the microphone down. Don't entertain the notion of ukulele lessons. Don't ask the karaoke DJ for some old-school Gloria Gaynor because you really don't have the chops -- or the track record -- to pull off "I Will Survive" on stage.

Add Best Buy to My Watchlist if you want to track the consumer electronics giant as it hits another bad note.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.