[WVNan]

That critter would not center. He refused.

[vox_freedom]

You know, those green dancing frogs have a mind of their own!

[musicman]

It’s a LOT more centered NOW that yer gettin’ the hang of it!!!!!

[Fiddlstix]

That critter would not center. He refused.

This is the html code you posted.......

<center>She'll be comin' round the mountain when she comes.<br>She'll be comin' round the mountain when she comes.<br>She'll be drivin' six green modems when she comes.<center> <img src="http://www.gifs.net/Animation11/Animals/Frogs/frog_dances.gif"> </center> </center>

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It probably would've worked better like this:
(Without using two <center> tags. Then again it also depends somewhat on how the anigif was formatted when it was made)

<center>She'll be comin' round the mountain when she comes.<br>She'll be comin' round the mountain when she comes.<br>She'll be drivin' six green modems when she comes.<br> <img src="http://www.gifs.net/Animation11/Animals/Frogs/frog_dances.gif"> </center>

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She'll be comin' round the mountain when she comes.
She'll be comin' round the mountain when she comes.
She'll be drivin' six green modems when she comes.