( CNN ) -- Everyone should know by now that Lorde and Taylor Swift are good friends -- and if you mess with one , you 're messing with them both . DJ/music producer Diplo learned that lesson the hard way on Wednesday , when Lorde stepped in to protect Swift on Twitter after Diplo made a gross observation about Swift 's physique . `` Someone should make a kickstarter to get taylor swift a booty , '' Diplo , who 's worked with several of music 's biggest names and is rumored to be dating Katy Perry , tweeted to his more than 1 million followers Wednesday afternoon . It was n't long before his wish was granted : There 's now a `` Get Taylor Swift a Booty '' fundraising campaign on Fundly . Obviously , Swift 's army of fans was n't going to take that . But it was Lorde who delivered the final smackdown . `` should we do something about your tiny penis while we 're at it , '' Lorde messaged Diplo . If there 's an `` awesome friend '' award , Lorde 's winning it hands-down . The Grammy winner ( born Ella Yelich-O'Connor ) celebrated her 18th birthday on November 7 , and she marked it with some quality time with her BFF Swift . `` It 's Ella 's 18th birthday technically , '' Swift shared on Instagram , `` but we all know she 's really 300 and knows all the secrets of the universe . ''
Lorde defended Taylor Swift when producer Diplo made fun of Swift 's physique . The singer tweeted a cutting remark in response . Lorde and Swift are known pals .