This week will be remembered forever as the end of the reign of "Born This Way." After debuting in the top spot and spending six weeks there, the lead single from Lady Gaga's upcoming album of the same name has dropped to number four on the Billboard Hot 100. Katy Perry's "E.T." takes its place on top after seven weeks, picking up a ton of airplay in the past week. Expect the track to stick around for a while, especially considering the video for "E.T." premieres tonight (Thursday, March 31) at 7:53 p.m. ET on MTV and MTV.com.

Perry wasn't the only star to change the game in the top 10, as Wiz Khalifa stormed the upper echelon of the chart with "No Sleep." Khalifa, who previously topped the chart with "Black and Yellow" and also has his "Roll Up" at number 29, just released his major label debut Rolling Papers and appears to have resonated with a number of different audiences.

Speaking of crossovers, Chris Brown's "Next to You" (his tag-team with Justin Bieber) made a strong debut this week at number 26. The chart-topping status of Brown's new album F.A.M.E. should make him a fixture on the chart for the better part of the rest of the season. Brown sits just head of Tinie Tempah's "Written in the Stars," which has picked up a lot of attention thanks to its status as the theme song of WrestleMania XXVII (which airs this Sunday, April 3).

Finally, pay attention to the fact that Taylor Swift's "Mean" is back on the chart. Though she has been quiet on the Hot 100 lately, expect Swift to make a big splash as the months roll on into summer.