The 'Dark Horse' singer responds to the 'Wrecking Ball' singer's twitter bashing yesterday.
Week's Top Stories
This week's biggest news stories in 60 seconds
Face Swaps, Selfies And Katy The Weather Girl! Enjoy...
The 'I See Fire' star gives a short acoustic rendition of Queen Bey's latest track.
The 'Happy' star has thanked restaurant chain Arby's for their huge bid to win the accessory.
The 'Hot N Cold' singer gives early rises a treat when she delivers a unique take on the day's forecast.
The One Direction man has been working with the Irish band this week on a "massive" sounding new tune.
The Killers, Rizzle Kicks, Bastille, Rudimental and more will also perform at this year's event.
The group will play five shows in five countries over five days.
This Week's Most Viewed Photos
Taylor Swift and Lorde cement their pop friendship, Rihanna and Drake fuel fresh romance rumours and Louis Tomlinson gets a new tattoo in this week's best pictures so far.
From Ed Sheeran's battles with salad (!) to Calvin Harris confirming some VERY exciting news... see EVERYTHING you may have missed on Twitter this week.
Last week saw Route 94 take the top spot with 'My Love' - can he stay there for a second week? Check out the full top ten.
The 'Can We Dance' four-piece are expected to announce their first EVER album any time soon and all the #Vampettes out there can't wait to see what the boys have in store! Find out what The Vamps have in store on their record....
Recently Played Tracks
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Live Top 10
1 Route 94 My Love (feat. Jess Glynne)
2 Dvbbs & Borgeous Tsunami (Jump) [feat. Tinie Tempah] [Radio Edit]
3 Enrique Iglesias I'm a Freak (feat. Pitbull)
7 Flo Rida How I Feel
8 John Legend All of Me
10 A Great Big World & Christina Aguilera Say Something