This may be the guest role that Neil Patrick Harris was born to play. The actor has already shown off his musical chops on Broadway, starring in 'Cabaret' and 'Sweeney Todd,' to name just a couple of shows. Now, he gets to appear on 'Glee' (Tue., 9PM ET on Fox).

[Spoiler alert.]

I used to love watching Ozzy on The Osbournes, even if he did make about as much sense as Paula Abdul. But I guess Ozzy isn't as "out of it" as I thought. According the New York Post, Ozzy was scheduled to perform during the American Idol May 23rd finale, but canceled at the last minute when he found out he'd be singing a duet with Sanjaya Malakar.

Ozzy reportedly called Sanjaya "a hairstyle-challenged idiot" and refused "be on stage with that idiot." Aerosmith's Joe Perry apparently had no problem appearing on stage with the infamous Sanjaya.

Later this month, Animal Planet is debuting a two-hour program about famous rock stars and their horses. Not pets, just horses. It's called Trail Mix. One of the biggest names on the show is Sheryl Crow, who will talk about her relationship with her four horses, and how they inspire her songwriting. Other singers on the program include Aerosmith's Joe Perry, LeeAnn Rhimes, Mary Chapin Carpenter, and Irish tenor Ronan Tyan. The show also features former Matchbox 20 frontman Rob Thomas and his horse(s), which is sort-of surprising to me, because he just doesn't strike me as the horseback-riding type. I'm not really sure what the horseback-riding type is, but the other singers featured on the show seem like, yeah, they'd own horses. Two hours is an awful long time to talk about someone else's horses, but if you're a fan of horses (or of those singers), I guess it could be interesting.

Trail Mix premieres on Animal Planet on January 29th from 8-10 pm (ET).