Do you think Madonna has reached her expiration date?

She reached her expiration date when she kissed Britney Spears.

If Madonna would actually get back to her musical roots and focus on the music rather than silly tabloid things, she might actually still be worth a listen. As it is now, there's nothing fresh about her newest stuff. So, I would say the answer is yes.

she might be around 50, but her music is still getting a lot of play time on the radio and in some (not all) clubs. as long as she can still get that, she hasn't expired.

She reached her expiration date nearly 10 years ago

NOT in terms of age, but in terms of creativity

Some of my favourite singers / musicians are in their 60's, and no where near expiring, because their creativity is still fresh.

Pretty much. The old girl had a nice run, but it can only go on for so long. She seemed like cutting edge in the early 80's (or maybe I just liked the videos), now her latest album flops and Kabbalah nonsense is just old news.

She looks good physically for 50 but her perpetually pissy expression and bad teeth keep her out of the "hot" category for sure.

Wait a minute now....50 can be cool! But yes she has only because she tries to hard now.

About 15 years ago.

Yes! I can't stand her now. I used to be a fan of her but she tries to hard to stay in the spotlight. She's only famous because of the stupid things she does, not because of her music.

About 35 years ago before she ever made her first record.