Norfolk Showground is more used to countryside activities — but this weekend it will again be the site for some altogether more urban sights and sounds.

Some of the biggest names in urban music will be taking to the stage for the Sundown Festival, a two-day festival that is bigger than ever this year as it continues to rival more established events.

The festival is now in its fourth year. Organisers have once again assembled a genuinely impressive line-up of talent that reads like a who's who of recent chart toppers, including Chase & Status, Tinie Tempah, Zane Lowe, Katy B, Foxes and Pusha T on the Saturday, with Ellie Goulding, John Newman, Clean Bandit, Neon Jungle, Ella Eyre and Jess Glynne on the Sunday.

All About She, Sasha Keeble and Virus Syndicate are among the Saturday afternoon performers, with Intensi T, Hatty Keane and M.O on the Sunday afternoon line-up

Elsewhere, number one selling artist Second City, Copyright and Christoph join House specialists Defected Records as they host Sundown's dance Stage 2 on the Saturday night. Loadstar, Frankee and Mind Vortex will join drum and bass label RAM Records' takeover for the Sunday.

More than 40,000 people from across the region and beyond — including thousands of youngsters from Norwich, who perhaps still can't quite believe its happening again, right on their doorstep — are expected to descend on the Showground, topping the 38,000 who attended last year.

Many will be making a weekend of it and either camping on the site or checking into nearby hotels and bed and breakfasts, offering a late summer boost to the local economy.

All camping tickets sold out months in advance and they will be able to start the party early with a special opening night bash in a Big Top on Friday night exclusive for those camping. That's a first for this year as is the addition of posh 'Glamping' from Yippee Yurts for those wanting on-site luxury.

Tinie Tempah headlines Sundown for the first time, with the We Bring the Stars Out, Children of the Sun and Lover Not a Fighter singer leading the line-up on Saturday's main stage.

Also performing on the Saturday, Chase & Status — aka Saul Milton and Will Kennard — one of the UK's biggest electronic acts, are renowned for their explosive live sets.

Their first two records More Than Alot and No More Idols saw the duo segue effortlessly from underground dance heroes into a chart-topping juggernaut that has seen them go on to produce tracks for some of the biggest names from Rihanna to Example. Meanwhile, their latest album, Brand New Machine, is a genre-blending, euphoric collection of hip hop, dubstep, house, garage and jungle featuring the prime of the UK's best new vocalists, including Moko, Elli Ingram and Louis M^tters.

The anthemic new record was made to be heard at a festival, so make sure you're down at the front and more than ready to dance yourself stupid for this one.

Brit-Award nominee Ellie Goulding, regarded as one of the most versatile and eclectic female singers in the UK today, headlines the main stage on Sunday. The Starry Eyed, How Long Will I Love You and Burn singer has not only enjoyed huge solo success, but has also landed hits in collaboration with a number of Sundown artists, and is welcomed to the festival for the first time.

Fellow Brit-Award nominee John Newman will also make his first Sundown performance on Sunday's main stage after becoming one of the hottest artists to have soared into the public psyche with the number one hit singles Feel the Love and Love Me Again.

Cambridge electronic pop troupe Clean Bandit, who broke through spectacularly in January with Rather Be – the most successful single of the year, and the first to stay at Number One for four weeks since 2011 will bring their appealing, intelligent sound, which uses synths, violins, drum machines and a rotating cast of vocalists, to the Sunday night.

Festival spokesman Dion Clements said: 'Sundown has enjoyed incredible success in quickly establishing itself as one of the UK's best live music events to end the summer season.

'Tinie Tempah and Chase & Status are like established Sundown royalty, while Ellie, John and Clean Bandit offer Sundown festivalites the chance to see them perform here for the first time.

'With our unique mixed offering of the top urban, pop and dance acts, Sundown caters for a massive range of tastes in the music spectrum, bringing together a diverse music audience for one huge weekend.'

Last year was the most successful year so far she added, and they hope to further build on the success this year with word now spreading for beyond the region.

'Last year was the biggest yet. We had people coming from Scotland, Birmingham and Wales, all over the country. The word has definitely spread about Sundown. It's the festival-goers that make it such a fantastic experience. They play a big part in creating the amazing atmosphere.'

• Sundown Festival takes place at Norfolk Showground from August 29-31.

• Weekend tickets without camping from £65, day tickets £36.50 (Sat/Sun). VIP tickets including back stage access also available from £136.50.

• Book on 0871 2241113, www.nationalboxoffice.co.uk or www.sundownfestival.co.uk