Today’s reveal on Christina Aguilera’s website turned out to be the Bionic album cover, which features the singer—or at least half of her—staring at us blankly with her trademark ultra-red lips opened just slightly. The other half of Xtina’s face looks like some crazed sci fi nut getting an early start on Halloween. (Who knows—maybe’s she’s a closet Tron geek?)

After the jump: more details on Bionic, plus the full album cover.

The first thing to note is that there’s no solid release date set for Bionic yet. Xtina’s official site simply notes it’ll be out “Summer 2010.”

However, things are in full swing for first single “Not Myself Tonight”:

* It’s produced by Polow Da Don (Chris Brown’s “Forever,” Fergie’s “Glamorous,” etc.)

* A preview snippet will be up on Christina’s site tomorrow (March 26)

* Full song will be up on the site at 6 p.m. on March 30

* The song hits radio April 5

* The single will be made available on iTunes April 13

And, here are the lyrics to “Not Myself Tonight” (cover your eyes for the F word, children):

You know tonight
I am feeling a little out control
is this me
you wanna get crazy
because I don’t give a…

1ST VERSE
I’m out of character
I’m in rare form
and If you really knew me
you’d know its not the norm

B SECTION:
Cause I’m doing things that I normally won’t do
the old me’s gone I feel brand new
and if you don’t like it fuck you

The music’s on and I’m dancing
I’m normally in the corner just standing
I’m feeling unusual
I don’t care cause this is my night

HOOK:
I’m not myself tonight
tonight I’m not the same girl same girl

I’m not myself tonight
tonight I’m not the same girl same girl

2ND VERSE:
I’m dancing alot and I’m taking shots I’m feeling fine
I’m kissing all the boys and the girls
someone call the doctor cause I lost my mind

B SECTION:
Cause I’m doing things that I normally won’t do
the old me’s gone I feel brand new
and if you don’t like it fuck you

The music’s on and I’m dancing
I’m normally in the corner just standing
I’m feeling unusual
I don’t care cause this is my night

HOOK:
I’m not myself tonight
tonight I’m not the same girl same girl

I’m not myself tonight
tonight I’m not the same girl same girl

BRIDGE:
In the morning
when I wake Up
I’ll go back to the girl I used to be
but baby not tonight

HOOK:
I’m not myself tonight
tonight I’m not the same girl same girl

I’m not myself tonight
tonight I’m not the same girl same girl

Yah, that feels good
I needed that
get crazy
let’s go
that’s right
come on
give it to me now, don’t stop

Looks like someone’s feeling a little dirrty again!