Former Texas Rep. Beto O'RourkeBeto O'RourkePoll: Biden leads Democratic field by 6 points, Warren in second place The Hill's 12:30 Report: Anticipation high ahead of first debate Warren visits migrant care shelter, says children being marched 'like little prisoners' MORE's (D) musical talents were apparent again on Wednesday after liberal news outlet Mother Jones published old videos of O'Rourke performing with a band while in full costume — a onesie and sheep mask.

In the video, O'Rourke performs the rhythm guitar part of the classic The Ramones hit "Blitzkrieg Bop" in a New Zealand accent while dressed as a sheep complete with a full mask at a 2003 concert at the now-closed Moontime Pizza in El Paso, Texas according to Mother Jones.

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The band's gimmick, according to one former member, was to pretend to be a group of famous artists from New Zealand that disguised their looks onstage to hide their true identities.

“Our persona was that we were a very famous band from New Zealand and we didn’t want people to know our true identities — that’s why we wore masks,” Ailbhe Cormack, the band’s former bassist, told Mother Jones. “I think people followed along with the mystery of it, but they knew who we were.”

Video of the performance posted to YouTube had just dozens of views before its discovery Wednesday, according to Mother Jones.

O'Rourke is considered a top potential contender for the 2020 Democratic Party nomination for president, and was listed in a Harvard poll last month as Democrats' third most-popular choice for the nomination behind former Vice President Joe BidenJoe Biden'Teflon Don' avoids the scorn of the 'family values' GOP — again Don't expect Trump-sized ratings for Democratic debates Hickenlooper laughs off lack of recognition by security guard at Democratic debate MORE and Sen. Bernie SandersBernie Sanders2020 Democrats spar over socialism ahead of first debate 'Teflon Don' avoids the scorn of the 'family values' GOP — again Don't expect Trump-sized ratings for Democratic debates MORE (I-Vt.).

The former lawmaker, who lost a highly-publicized race for Sen. Ted CruzRafael (Ted) Edward CruzWhite House to convene social media summit after new Trump attacks GOP lays debate trap for 2020 Democrats O'Rourke on Senate bid backer Beyoncé: I will have to 'earn her support' for 2020 MORE's (R-Texas) seat in November, has not ruled out the possibility of seeking the party's presidential nomination.

“Amy and I made a decision not to rule anything out,” O’Rourke told reporters after a late November town hall in El Paso.