Barenaked Ladies found out Wednesday that their single, “One Week,” hit No. 1 on the Billboard charts this week. While many bands would play it cool with their success, the ebullient boys in the Canadian band bounced in front of the sold-out crowd at the Madison Square Garden theater, chanting “We’re No. 1!” They then proceeded to make up an impromptu song titled “I’ve Got the No. 1 Record, How ‘Bout You?” Later, the band took a poke at the fickleness of the music biz when, after singing “One Week,” lead vocalist Steven Page announced that “due to the fluid nature of the rock charts, in the middle of playing that song it slid from No. 1 to No. 57.”
Their breakout fifth album, “Stunt,” continues to dominate the charts (13 weeks in the top 10) but fame hasn’t dampened the Ladies’ goofiness. Interspersed with a healthy selection from their new record and old favorites like “If I Had $1,000,000” and “The Old Apartment,” Page and lead guitarist Ed Robertson slipped into their trademark improvised songs. The concert’s subjects included a rap about dancing in Janet Jackson’s troupe and having designer Helmut Lang over for dinner from Ranch 1. They also did an ode to an off-stage security guard whom they dragged into the spotlight — sung to the tune of “Jack and Diane”: “Here’s a little ditty/’bout a guard named Johnny D/he’s over there/keeping kids off of me.” The crowd roared, but don’t look for that one on the charts.