Complex sentence: Crawford began her TV career on Shipwrecked 3 in 2001 but began presenting in 2007 when she hosted the Red Carpet and Back Stage show of the Vodafone Live Music Awards for The Hits music video channel.
Split into simpler sentences: Crawford began her TV career on Shipwrecked 3 in 2001. But began presenting in 2007 when she hosted the Red Carpet and Back Stage show of the Vodafone Live Music Awards for The Hits music video channel.