Yup, the whole gang, Maggie excluded, and almost certainly not Santa's Little Helper.

Check it out...hopefully we'll get the clip tonight before airtime.

 The meat of the CBS/ "Late Show" release:

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"The longest running primetime entertainment series which is currently in its 20th year on
television, “The Simpsons” will reach another milestone on Sunday, Jan. 10 with the broadcast of its 450th episode, entitled “Once Upon a Time in Springfield.”  Also on Sunday, the episode will be followed by an hour-long documentary, “The Simpsons 20th Anniversary Special in 3-D on Ice,” produced by documentarian Morgan Spurlock.

 
This is not the first time a member of The Simpsons family has read the Top Ten List –
Homer Simpson presented the “Top Ten Reasons Why I, Homer Simpson, Should Be the Next President” on the LATE SHOW May 17, 2007."