Gwen Stefani and Blake Shelton are taking their relationship to the next level by purchasing their first home together.The couple has been splitting its time between Stefani’s Los Angeles property and the country singer’s estate in Oklahoma ever since the stars began dating in late 2015, following the breakdown of their respective marriages to Gavin Rossdale and Miranda Lambert.However, as they approach their five-year anniversary, the musicians have decided it’s time to officially move in together – so they’ve picked out a brand new US$13.2 million ($18.4 million) pad in Los Angeles’ San Fernando Valley.According to Variety, the deal for the sprawling manor house was made off-market, and the property boasts a home theatre, a four-car