"Jesus, Baby" is performed by the band Faith + 1 in the Season Seven episode, "Christian Rock Hard". It was sung during Christ Fest to win over the audience and help sell their self-made album at the event.
Cartman tricks the band Sanctified into believing they are praying before their concert appearance but instead locking them in a closet. Faith + 1 goes on in their absence gaining the admiration of the concert attendees. A record producer is so impressed, he offers the to sell their album to a wider audience.
You know, Jesus, I've been thinking a lot about you lately and... well... that's why I wrote this song.
I love you, Jesus
I want you to walk with me
I'll take good care of ya, baby
Call you my baby, baby
You died for my sins
And you know that I would die for you, right?
What's the matter, baby?
You're tremblin' Jesus, ba-baaaaaayyyy
Is my light
You know when I'm without you there's a black hole in my life
Oh-oooh I want to believe
It's all right
But I get lonely in the night
And it's up to you to save me