This Week in Billboard Chart History: In 2011, Lady Gaga's 'Born This Way' Blasted in at No. 1 on the Hot 100

Christopher Polk/Getty Images for Clear Channel
 Lady Gaga performs at the MGM Grand Garden Arena on Sept. 24, 2011 in Las Vegas.

Plus, remembering feats by Madonna, George Michael & Celine Dion.

Your weekly recap celebrating significant milestones from more than seven decades of Billboard chart history.

Feb. 25, 1995
What's Madonna's longest-leading Billboard Hot 100 No. 1? It's not any of her signature '80s songs like "Like a Virgin" or "Material Girl" (the latter of which peaked at No. 2). Nope, it's ballad "Take a Bow," which, on this date, began its seven-week command.

Feb. 26, 2011
Making a fitting grand entrance at No. 1, Lady Gaga's "Born This Way" became the Billboard Hot 100's landmark 1,000th No. 1. The song arrived as the title cut to her second full-length studio album, which she had touted ahead of its release as "greatest album of this decade." The set yielded four total top 10s.

The same historic week, the Glee Cast passed Elvis Presley for the most Hot 100 chart hits. To date, the Fox TV troupe (which has four episodes left in the series' run) has charted a record 207 entries, while Drake now ranks second with 192 charted titles.

Feb. 27, 1988
George Michael began presiding over the Billboard Hot 100 with his gospel-tinged "Father Figure," the second of four No. 1s that he tallied from his debut solo album Faith.

Feb. 28, 1998
Amid buzz for the blockbuster Titanic, Celine Dion's love ballad from the movie "My Heart Will Go On" roared onto the Billboard Hot 100 at No. 1 for the first of its two weeks on top.

March 1, 1997
LeAnn Rimes notched her first of two No. 1 albums on the Billboard 200, as Unchained Melody/The Early Years debuted on top. You Light Up My Life – Inspirational Songs then led in September 1997.

March 2, 2013
Baauer blasted in at No. 1 on the Billboard Hot 100 with EDM/trap track "Harlem Shake." He had produced the song in his bedroom studio on Feb. 5, 2013, not expecting the onslaught of user-generated viral videos that would follow. "It's literally unbelievable," Baauer said upon the song's coronation. "It's amazing to have this track recognized by the world."

March 3, 2012
Adele's aptly-titled 21 collected a 21st week at No. 1 on the Billboard 200, passing Whitney Houston's The Bodyguard to become the longest-leading album by a female artist. 21 went on to total 24 weeks on top. In 2015, the set was revealed as the all-time No. 1 in the Billboard 200's history.