The couple donned their best eveningwear to join the likes of Louis Walsh and Holly Valance at the event in central London on Tuesday (3 February).
As always, Simon opted for the open-necked shirt, no tie look, while Lauren was beautiful in an elegant floor-length black gown.
Last night's gala was held at Banqueting House in Whitehall. The British Asian Trust was founded by Prince Charles to raise awareness and aid for poverty-stricken people in South Asia.
Simon's appearance came after he announced auditions for his latest TV talent show, La Banda, which aims to find the next Latino boyband.
Auditions are open to boys from the US or Puerto Rico who are over the age of 14 and, as per usual, the winners will get a recording contract.
Meanwhile, Simon and Lauren are preparing for their son Eric's first birthday. The tot – Simon's first child – was born on Valentine's Day last year.
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