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7 June 2013, 15:49
The 'All Fired Up' singers and 'Taking Over Me' four-piece are gearing up for their sets on Sunday.
Lawson and The Saturdays have been tweeting fans from their rehearsals ahead of the Capital FM Summertime Ball 2013 this weekend.
Both acts are set to perform live at the Wembley Stadium extravaganza on Sunday (9th June), and have been preparing for their sets by rehearsing this week.
Lawson drummer Adam Pitts tweeted fans to say the band can't wait to get out on stage in two days time, while bassist Ryan promises some "new surprises" for their performance.
"Today we are in rehearsals for Summertime Ball!" 'Standing In The Dark' star Adam tweeted this week. "2 days till WEmbley Stadium! @CapitalOfficial @WembleyStadium.
"Rehearsals are sounding amazing!" Ryan also posted. "New surprises in store for the weekend ;)."
Check out a picture of Frankie Sandford making her way to rehearsals for the Capital FM Summertime Ball 2013 below (Credit: Flynet):
'What About Us' band The Saturdays are also preparing hard for the concert, and band member Frankie Sandford was spotted heading in to a studio to rehearse yesterday (6th June).
"#CapitalSTB rehearsals are underway!" the 'All Fired Up' stars tweeted. "Let's do this… Who's coming Team Sats??
"Rehearsals for the Summertime Ball DONE!" Mollie King later added. "Body aching! Wembley, see you Sunday!"
Fellow Summertime Ball performers The Wanted have also been teasing fans about their set, and tweeted to say they are all "seriously hyped" for the Capital FM event.
The Capital FM Summertime Ball 2013 takes place Sunday 9th June with a line-up also boasting acts like Taylor Swift, Robbie Williams and Olly Murs.