Over the weekend, the music world was hit with the loss of Amy Winehouse. The troubled 27-year-old singer was found dead in her London apartment on Saturday.

Winehouse burst on the scene with her hit “Rehab” and famously battled drug and alcohol addictions throughout her short career. Although an overdose is suspected by many as her cause of death, an official cause has yet to be determined. CBS is reporting that the coroner on the case has ruled that there are no suspicious circumstances in Winehouse’s death.

Of course when any entertainer passes, whether it’s due to tragedy or simply old age, the products of said entertainer see a surge in popularity. When famous movie star dies, we might see increased sales and rentals of their films or we might see book sales skyrocket when an author passes.

Sales of Winehouse’s music have exploded following her death, but one retailer has found itself embroiled in a bit of controversy.

Microsoft’s Xbox 360 PR in the UK tweeted this a few hours ago –

Many felt that this was incredibly insensitive and lacking in class, as it clearly looks as though Microsoft is trying to capitalize monetarily on a tragic death.

After receiving tons of tweets in reply such as “Stay classy, Microsoft PR Jackals” and “Talk about cashing in on someones death!” the company issued an apology in the form of two tweets –

The question here is this: Does bringing attention to a star’s death in collusion with offering products or merchandise step over the line? Or is it just timely marketing?

Microsoft is definitely not the only company to advertise Amy Winehouse music in the wake of her death. Apple is running and “Remembering Amy” advertisement today and Amazon has a Amy Winehouse 1983-2011 box on both its “Music” and “MP3″ pages. This box links to her albums and songs, available through Amazon.

How has Amy Winehouse’s death affected her album sales? Another question might be how well have these promotions worked?

Well, her album Back to Black is #1 on iTunes right now. And Back to Black B-Sides is the #4 album. Her song “Rehab” is the #10 song on iTunes. Back to Black is the #2 album on Amazon’s MP3 downloads and the #1 album on physical CD sales.

With her death, Winehouse joins music’s most famous club – the 27 club. Other notable musicians that have died at the age of 27 include Kurt Cobain, Jimi Hendrix, Jim Morrison and Janis Joplin.