Frank Oz did/does the voices of Miss Piggy - Fozzy Bear - "Animal" (I believe) and he's been known to do VO work for some products...you have to listen very carefully to hear it though...I don't think he wants "Miss Piggy/Fozzy/"Animal" to appear as if they're endorsing products, unless it's something for PBS or CTW and related entities...

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M. G. Burg
'10 - Dakota SXT - Daily Ride / ≈ 172.5K
.'76 - 450SLC - 107.024.12 / < .89.20 K
..'77 - 280E - 123.033.12 / > 128.20 K
...'67 - El Camino - 283ci / > 207.00 K
....'75 - Yamaha - 650XS / < 21.00 K
.....'87 - G20 Sportvan / > 206.00 K
......'85 - 4WINNS 160 I.O. / 140hp
.......'74 - Honda CT70 / Real 125
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“I didn’t really say everything I said.”
. . . . . . . . . . . . . . . . . . ~ Yogi Berra ~