If you're like us and value your sleep, you probably nodded off into your Ambien dreamland before the party started on post-prime time TV. Don't worry; we've got you covered. Here's the best of what happened last night on late night.

Bruce Willis was probably on the "Late Show with David Letterman" to promote a movie like "Sin City," but he spent most of the Monday, August 18 show being a goofball. At one point, he showed Dave his hands-free corn-eating system, which is pretty flawed, as you can see when corn starts falling all over him. It's a little bit gross, but also pretty funny, especially when Dave goes in for his own bite. It looks like they're making out, but they're just jointly eating hands-free corn. Nothing odd about that! It gets even weirder when Bruce puts on his hat to illustrate how to get the butter on the corn. Oh my. Props to the band for jumping in with harmonica music. In the second video, Bruce shows off his new fragrances, like "the brown one," and he and Dave use them as breath spray, then as "lubricant."
On a less "corny" note - since Dave was off last week, when Robin Williams passed away, he took about 10 minutes on Monday to honor the late comedian. Dave shared some early memories with Robin, adding that Robin was on Dave's shows a total of about 50 times. The video ends with a clip of Robin's many appearances. It's a great tribute.

On "The Tonight Show," Jimmy Fallon played a game called "Facebreakers" with golf stars Tiger Woods and Rory McIlroy. Tiger was Jimmy's caddy for the game against Rory, which was surprisingly hard for both guys. But you can imagine who won - his name was already engraved on the trophy!
The great Bill Cosby was also on "The Tonight Show." He rambled a little bit, but he also danced and called out "James Fallon" for interrupting him and doing his Bill Cosby imitation. As Bill asked the audience about the imitation, Jimmy did his Cosby impersonation in the background. They also played with Jimmy's desk markers and compared the sound of the markers rattling to Bill's 77-year-old body creaking. In the second video, Bill talked about his recent birthday and getting intimate as an older man. "The most frightening thing that you can hear from your wife on your [77th] birthday when you are carrying on ... is to hear your wife who is seven years younger than you say 'Keep going.'" Bill also crawled on the ground a bit and punished Jimmy for missing his marker-drop cue.

Over on "Chelsea Lately," singer Sia kept her back to the audience while discussing things like her recent marriage and the inspiration for the song "Chandelier." Sia apparently doesn't like to show her face and get that extra fame - or at least she doesn't like to do that anymore. Gimmick or smart move to retain privacy? Either way, it makes for awkward appearances like this when she and Chelsea point their chairs away from the audience and we have to kind of peek over their shoulders as they talk.