Genesis has been allowed near the microphone, i believe. When he's not dumping people by fax...

And Meg White has been known to warble a bit.

Who????? Watching the splendid Tom Petty and the Heartbreakers movie, Stan Lynch, drummer, sings some splendid hillbilly harmonies.

of the wonderful Jellyfish (there's a reunion I'd love to see). Lead singer, played drums standing up at the front of the stage.

Charmingly naif vocals on two VU tracks - strangely perfect! And several lo-fi Bo Diddley inspired solo LP's.

The bloke from Husker Du who wasn't either Bob Mould or the bassist with the fantastic handlebar lip cozy.

And, putting Husker Du into Wikipedia, I find that they took their name from a Danish Board game. Or vice versa.

...Phil Collins is not only a great drummer but a great singer and frontman too, in my humble opinion. I'm not fussed on most of the ballads he comes up with or attempts at R & B he did in Genesis and his solo career but when he stays away from that (which got less and less, admittedly!) I have no problems with him at all.

Roger Taylor of Queen is another one; his solo career never amounted to much (I must even confess to never hearing any of it!) but he has a fine heavy rock voice. He sang Queen's 'Tenement Funster', 'Drowse' and 'I'm In Love With My Car' and also, it's usually him doing the falsetto bits on Queen records.

Lee Kerslake of Uriah Heep did the odd vocal turn too, as did Keith Moon with that infamous 'Two Sides Of The Moon' album.

out of The Banana Splits, a ridiculous fictionalised band made up for a TV show. Oh, and Mickey Dolenz.

...of the Family Mahone.

Foo Fighters - drummer in Nirvana

..from Hanson - supplied backing vocals

The guy from Paper Lace. (I suppose I could check but.... ah, what the hell).
Oh, and was it the drummer from Lieutenant Pigeon who did the vocals?

...held the Roses together vocally, especially live.

He'd like to be a hairdresser. Or two. He'd like to be two hairdressers.

Well... more rapping, I suppose!

Yep the drummer was the singer.
Russ Abbot was also a Drumming Singer in the Black Abbots. there was a singing drummer in the Grumbleweeds too.
Does Dave Grohl count ?
Henry Rollins tells a really funny anecdote About Peter Cris from Kiss doing a Vocal solo on the song "Beth".
came across this on a Steely Dan fan page.
Midnight Cruiser by Steely Dan
"Jim Hodder was the drummer with them for the first few albums… They gave him a song to sing… I think it's about Richard Nixon."
and who could forget

See The Crowdies' "Italian Plastic" or "My Telly's Gone Bung" for evidence of the lead vocals, but was also a great harmony singer and a fantastic drummer.
And The Beat Farmers' Country Dick Montana on 'Vocals, Drums and Beer Runs' which is certainly in my list of top album credits. "Big Ugly Wheels" was one of his.
Another solo spotter is Vince Ditrich from Spirit of the West, who essays a fine "That's Amore" on their Greatest Hits compilation, backed by The Vancouver Symphony Orchestra, no less.
Oh, and on a technicality, Paul McCartney (see 'Back In The USSR', 'Band On The Run' et al).
Didn't Iggy Pop start out on 'the skins'?

...like Dave Grohl, started off as a drummer. He was even the Lemonheads drummer before he was the frontman. Re Iggy (above), yes.
The singer in SNAFU was the original drummer in Procul Harum. That, and the fact he had a Jesse Colin Young wide 'tache is about all I can remember, but they were the great white hope for a (very short) while. One single, I believe.

Dave Hemingway was the drummer of the Housemartins who sang co-vocals on "Build" and ended up being one of the three vocalists in The Beautiful South.

Or drumming while singing ....
But how many of these did both at the same time, as opposed to giving up drumming to be the singer?

Levon Helm...

Don Henley used to back in the day, not sure about now...

Phil Collins sang backing vocals and drummed whilst Peter Gabriel was still lead singer of Genesis...

Roger Taylor...

Has been mentioned, but I have to include this clip, even if we've all seen it before:

You're not. The sad thing is that the other one who thinks so is Robertson himself...

Being fair, he does look kind of cool, albeit in a very deliberate and self conscious fashion. I've read waaay too much about The Band to be objective about The Last Waltz. Which is a shame, because I think it's one of Scorsese's two most emotionally affecting films.

...Ace Frehley on Thursday night and his drummer (whoever he was) did more singing than Frehley did himself.

Jim Capaldi - on "Light up or Leave me Alone" from Traffic's brilliant Low Spark of High Heeled Boys and various solo outings

Karen Carpenter was a great drummer if my hazy memory serves me right.

Terry Bozzio. Recorded and performed with Zappa in the late 70's. Probably one of the greatest drummers of all time. His singing was not as good as his drumming, but he did it at the same time. Worth checking out "Titties and Beer" or "Broken Hearts are for Assholes" but if you're just interested in drumming, Bozzio's is pretty special on "The Torture Never Stops" and "Zoot Allures"

... singer for Primal Scream - Bobby Gillespie.

Albert Bouchard of Blue Oyster Cult (how do you type "o"s with umlauts!?!) - actually he wasn't terribly good

seems to be singing on Silver Star and Oh What A night - Gerry Polci? Pretty good either way.

..used to combine session drumming and backing vocals - if that counts - on some of the sturdier hits of the '80s. It's just hazy memory speaking here, but I believe she backed up the Fun Boy Three's 'Our Lips Are Sealed' and The Communards' 'Don't Leave Me This Way' (or maybe something else).

Did a bit with Microdisney too, but that might have just been the singing.

AND I think she tried her hand at a solo record.

That fella from Semisonic did that, at least on TOTP, live is uncertain, but it looked as if that was his gimmick.

Ok Fat Larry sung the last verse of Zoom
Cityboy sang 5705 from the back.
Oh what a night wasn't Frankie Valli's finest hour( in 1963)
And Grand Funk Railroad were not an American Band.
Ladies and gentleman of jury..... I rest my case