Apparently, it is so important that Barack Obama win the upcoming election that Justin Timberlake and Jessica Biel have agreed to make a public appearance together.

I know.

It’s that big.

The couple showed up to speak to the crowd on Saturday at a Las Vegas rally for the Democratic candidate.

Timberlake performed an off-the-cuff riff, singing “Vote in a Box,” a spoof of his infamous raunchy Saturday Night Live sketch, a campaign source tells Usmagazine.com.

“Me and Jess, we’re here as Americans. We’re here as humans because this is something we had to do,” Timberlake told the crowd at the Clark County Government Center amphitheater, according to the Las Vegas Review-Journal.

He added, “We’ve never publicly endorsed before. But we’ve never been so inspired by one person.”

(A source tells Us that Timberlake’s mother, Lynn, helped him write his opening remarks.)

Noting that the next president’s Supreme Court appointments could determine the future of legal abortions, Biel told the crowd, “Nobody should be able to say what you can do with your body.”

Joked Timberlake, “I give Jess the right to choose where we go to eat all the time. The funny thing is, what the woman chooses is usually right.”

“Brownie points for you,” Biel kidded back.

Teased Timberlake, “I know where my bread is buttered.”

Added Biel: “The bread is his penis and it’s buttered inside my vagina. In case you didn’t get that.”

Oh, and Justin: Comparing elective termination to the age-old Olive-Garden-vs-Buca-di-Beppo debate? Probably not the smoothest tactic. Just for future reference.

Jessica and Justin pose for a “candid” paparazzi shot while on vacation in Italy.

It never ceases to amaze me how under-the-radar this couple is most of the time. I actually have a lot of respect for them in that regard. I know, I know. If you’d told me last year that I would be using the word “respect” in reference to Jessica Biel, I would have been like, “I’m sorry, but by ‘respect’ do you mean ’slut’?” But she actually hasn’t been pimping out this relationship, surprisingly.

But, every now and then, photogs catch them being adorable, like this little snuggle in Milan yesterday. I love forehead kissies! They’re the bestest!

Sources are reporting that Britney Spears will do a duet with Justin Timberlake, and that it’ll appear on Britney’s new album, due at the end of the year. (Really? That’s soon!)

Um, I wonder how Jessica Biel feels about Britney and Justin spending all that studio time together?

Because, really, how freakin’ phenomenal would it be if Brit and Justin got back together? I don’t think anything could make me happier. And then if they got married and started adopting kids from Africa? Oh, oh, oh! I can’t think about this anymore, I get too worked up.

Most Boring Couple Ever Justin Timberlake and Jessica Biel dined at Eva Longoria’s restaurant, Beso, last night, and left holding hands.

I’m about ready for some drama to start here. These two have been dating peacefully FOREVER now. I think Miley Cyrus needs to work her magic.

You don’t see much of these two in public these days, but Justin Timberlake took girlfriend Jessica Biel and her doggy, Tina, for a walk in LA.

What’s with Jessica’s hair?

I guess all of Justin Timberlake’s girls are prone to this shit.

Yup, Jessica used an umbrella to shield herself from the paparazzi as she entered her yoga class in Santa Monica.

I guess one of the paparazzi got in her way, so she jabbed him with the umbrella.

Meanwhile, Britney’s somewhere celebrating the fact that “pulled a Britney” has meanings other than “showed the world your vagina.”