The sing-along version of the beloved 1978 musical "Grease" is playing in select theaters nationwide. While we remain hopelessly devoted to Danny and Sandy, here are five other movies that should also be released as sing-alongs: 1. "Singin' in the Rain" (1952): Remember when Hollywood could make cheesy movies and we loved them anyway? It was a magical time called the 1950s. (Google it!) Generations were bewitched by this Gene Kelly/Debbie Reynolds/Donald O'Connor classic. Not so much for Kelly's line reading -- "From where I'm standing, the sun is shining all over the place," awwwww -- but for his signature song-and-dance scene with the greatest dance partner ever: an umbrella.

2. "Funny Girl" (1968): So many Barbra Streisand flicks could make the list. But in this classic, everyone loves singing, "Don't tell me not to live, just sit and putter. Life's candy and the sun's a ball of butta!" Thanks to Lea Michele's version on Fox's "Glee," chances are you still have "Don't Rain on My Parade" swimming around your head. (If not, you do now!)

3. "Jesus Christ Superstar" (1973): Mary Magdalene didn't know how to love him, and Herod urged him to "prove to me that you're no fool; walk across my swimming pool." Add Carl Anderson's Judas raising the roof with the title song and you have a sing-along revival. Disciples don't buy tickets at the box office; they just pass the collection plate.

4. "South Park: Bigger Longer & Uncut" (1999): Yes, there are many songs here you can't or shouldn't sing in public -- ever. But you want to, anyway. Entertainment Weekly, despite counting 146 F-bombs in it, still names the feature-length cartoon as its eighth-best musical of all time. The family-safe "Blame Canada" was even nominated for an Oscar. (Secretly, you're singing along to the other "classic" by Terrance and Phillip now, aren't you?)

5. "Mamma Mia!" (2008): There's no hiding this fact: Abba is the saturated fat of pop music. So horribly bad for you, but you crave it nonetheless. (Come to think of it, a Big Mac and a glass of "Waterloo" would really hit the spot right now.) This entire musical was created with the sole purpose of getting an audience on its feet, the story a mere vessel to serve up the greatest hits of Björn, Benny and Co. And let's face it: We can all sing better than Pierce Brosnan.

On the other hand ... Here are five movies that need to avoid sing-along status at all costs:

1. "Grease 2" (1982): Maxwell Caulfield and Michelle Pfeiffer sing about bowling and sex education. Need we say more?

2. "Paint Your Wagon" (1969): Who knows the words to "Hand Me Down That Can o' Beans"?

3. "Can't Stop the Music" (1980): The best thing about this semibiographical flick about the Village People? Co-star Steve Guttenberg doesn't sing.

4. "Yentl" (1983): If you really want to sing along to a movie with cross-dressing, we direct you to 1994's "The Adventures of Priscilla, Queen of the Desert."

5. "Fiddler on the Roof" (1971): Aside from an exhausting three-hour running time, nobody but Topol can shimmy properly to "If I Were a Rich Man."