Katy Perry ready to collaborate with Taylor Swift

Singer Katy Perry has held out an olive branch to her rival Taylor Swift by announcing she will collaborate with the singer if she "says sorry".
The "Dark Horse" hitmaker seems happy to end her longtime feud with the 26-year-old "Blank Space" singer, reported Female First.
When asked in a Twitter Q&A if she would work with Swift, Perry, 31, replied, "If she says sorry, sure!"
The two singers have had an ongoing feud ever since the Swift claimed Perry nicked three of her backing dancers from her "RED" tour in 2012.