From Usher debuting his new songs to Will Ferrell as the guest host reprising his role as George Bush, Saturday Night Live (SNL) on May 12 was memorable, namely for the Justin Bieber, Michael Bolton and Natalie Portman cameo in the 100th Digital Short with Andy Samberg.

The 100th Digital Short sketch begins with Lonely Island members Andy Samberg and Jorma Taccone, joined by Bieber to sing in celebration.

Tonight we are celebrating our 100th short, the trio sang. Congratulations to us, to us, truly a major milestone. A celebration, yes, of us, of us, here's what we're going to do. We're going to shake off the cobwebs and limber up, and stretch it out and do plenty of Pilates 'cause tonight, we're going to suck our own c--ks.

Some of the most famous sketches in past Digital Shorts were reprised, like Justin Timberlake and Samberg's D-k in a Box skit and Natalie Portman as her rapper alter-ego, rapping Yeah I had a baby, but I'm still crazy. Other sketch reprisals included Michael Bolton's Captain Jack Sparrow from Pirates of the Caribbean and Mad Men star Jon Hamm as shirtless saxophonist Sergio Flores.

Along with a brief cameo in the Digital Short, Usher debuted two new songs from his upcoming album, Looking 4 Myself, signing Scream and Climax for his third appearance on Saturday Night Live.

In addition to the 100th Digital Short, alum Will Ferrell returned as the SNL host bringing back some of his best impersonations like former U.S. president George W. Bush. Joined by Jason Sudeikis as Vice President Joe Biden and Fred Armisen as President Obama, the opening sketch begins with Sudeikis and Armisen arguing about their camp's announcement endorsing gay marriage and a black tie party with Elton John and Lady Gaga. Ferrell and Sudeikis then join forces drinking beer and talking about troubles in the White House.

Another memorable sketch poked fun at the controversial Time magazine breastfeeding cover in Seth Meyer's Weekend Update.

Really, Time magazine!? Meyers said in the sketch. This is the image you went with for Mother's Day? Look, I have nothing against breastfeeding, but there are more appropriate places to breastfeed your kid than the cover of Time magazine.

And Time, Meyers added, don't get me wrong. I understand you have to do what it takes to sell magazines and it's a good cover. But if you wanted a great cover, you would have photoshopped out the chair.

Liam Neeson and Samberg as Nicolas Cage also stopped by to discuss Neeson's new movie Battleship on the Weekend Update with Meyers, admitting he is working on a movie inspired by a board game: It's called Hungry, Hungry Hippos. I play a marble that escaped from Hell to exact revenge on the hippos that killed my daughter...

View the videos about to see some of the highlights of SNL.

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White house George W. Bush Joe biden Lady Gaga