Billboard Hot 100, the most by any artist since The Beatles had thirty-one songs in the chart in 1964; in 2010, it placed eighty singles on the Billboard Hot 100, far outstripping the previous record. In February 2011, Glee surpassed Elvis Presley as the act with the most songs placed on the Billboard Hot 100 chart, though fewer than one-fourth of them have charted for more than one week. The cast performance of "Don't Stop Believin' was certified gold on October 13, 2009, achieving over 500,000 digital sales, and on March 16, 2011, received platinum certification for having sales of over a million. The series' cover version had a positive effect on sales of Rihanna's "Take a Bow", which increased by 189 percent after the song was covered in the Glee episode "Showmance". However, there has also been critical condemnation of the cast performances. Jon Dolan of Rolling Stone commented that Matthew Morrison "couldn't rap his way out of a 98° rehearsal", and AllMusic's Andrew Leahey wrote that Cory Monteith and Dianna Agron "can't sing nearly as well as their co-stars". E! Online's Joal Ryan criticized the show for its "overproduced soundtrack" and complained that many songs rely too heavily on the pitch-correcting software Auto-Tune: "For every too-brief moment of Lea Michele sounding raw—and lovely—on a "What a Girl Wants", or Monteith singing a perfectly credible REO Speedwagon in the shower, there's Michele and Monteith sounding like 1990s-era Cher on "No Air", or Monteith sounding like the Monteith XRZ-200 on the out-of-the-shower version of "Can't Fight This Feeling". During the second season, Rob Sheffield for Rolling Stone noted the Britney Spears and Rocky Horror tribute episodes as examples when he lauded Glee and its choice of music. He praised Murphy for his selection and resurrection of "forgotten" pop songs and compared the show's uniqueness to "MTV in its prime" as the embodiment of popular culture. Some artists, including Slash, Kings of Leon and Foo Fighters, have declined to have their songs used on the show. Murphy has been publicly critical of these refusals, which has led to exchanges in the press between him and a number of artists. A slated cover of Sir Mix-a-Lot's "Baby Got Back" in the season four episode "Sadie Hawkins" has been criticized for blatantly copying a rendition of the song by Jonathan Coulton without his permission, without giving creative credit. Side-by-Side comparison shows the waveforms