Pop sensation Ke$ha has taken a dig at Britney Spears, over her career hitting a low after initial success, in her new song 'Styrofoam'.

According to Global Grind, the pop star's track hints at how things don't remain the same always.

One lyric reads: "In ten years, Britney Spears ... Britney, who?", reports the Daily Telegraph.

Also, Ke$ha recently criticized Spears for lip-synching at her concerts. (ANI)