For some reason, April 1 seems to be the day some of the biggest acts on the planet decide to make some of the strangest announcements ever.

Why, just last year, [article id="1608289"]Kid Rock made it known[/article] that he had acquired the naming rights to the Detroit Tigers' stadium, [artist id="1111141"]Coldplay[/artist] revealed plans to record an album in zero gravity and [artist id="1189271"]Trent Reznor[/artist] unveiled his [artist id="503162"]Timbaland[/artist]-produced Strobelight project. Oh yeah, and Björk proclaimed that she was going to be fronting Led Zeppelin, with a full tour booked for the summer (whatever happened to that tour, anyway?). Needless to say, it was a pretty busy day in the MTV Newsroom.

So it should come as no surprise that this year is no different, with some of your favorite acts announcing plans for exclusive fragrances, majestic tours and upcoming (and thoroughly wondrous) film projects.

Most notably, the guys in Coldplay took to their official site to unveil "Angst," a custom fragrance made of "sangre, sudor and lágrimas" (in other words, blood, sweat and tears) and packaged in a "Brian Eno-designed bottle." They also revealed the ad campaign for the scent, featuring an image of shirtless-yet-pensive guitarist Jonny Buckland.

"This is something we've wanted to do for a long time," frontman Chris Martin says on the site. "People like to smell nice and we thought we could help them out."

The band was quick to point out that all ingredients in Angst "have been sourced from FairTrade suppliers," so you can feel good about buying yourself a bottle or two. The fragrance is currently available through the band's online merch site for the low price of £42 -- although at present, it curiously was sold out.

Meanwhile, "American Idol" runner-up Adam Lambert has apparently chosen April 1 to announce plans for not just an ambitious world tour, but also a starring role in the annual Radio City Christmas Spectacular (it's never too early to make plans for the holidays, after all) and a remake of MGM's "Wizard of Oz," alongside fellow "Idol" alum Carrie Underwood.

In a post on his fan site Planet Fierce, it was revealed that Lambert's 2010 world tour will kick off May 14 in Buenos Aires, and will be highlighted by a six-night stand at New York's Madison Square Garden and a gig at London's Wembley Stadium alongside Queen, David Bowie, Muse and the Rolling Stones.

His Radio City gig will feature him high-kicking alongside the legendary Rockettes, and his turn in "Wizard" will see him playing a reported five roles, including the titular Wizard of Oz. Carrie Underwood will star as Dorothy Gale, and a host of other "Idol" favorites -- including David Cook, Chris Daughtry, Kris Allen and Kelly Clarkson -- have also signed on to appear.

Lambert was so excited about the news that he took to his Twitter account to gush (i.e. clarify). We can't blame you, Adam -- sounds like 2010 is gonna be a big year!

What great musical April Fool's Day pranks have you heard about today? Let us know in the comments below!