Olly Murs and his girlfriend Amelia Tank have taken the next step in their relationship after welcoming a new family member.The singer introduced Missy – the couple's adorable new Shiba Inu puppy – to his Instagram followers on Thursday, and she's so cute!READ: Who is Olly Murs' girlfriend? Meet bodybuilding champion Amelia TankWATCH: Olly Murs and his girlfriend prank one anotherSharing a photo of himself pulling a funny face next to his new pooch, Olly simply wrote: "Meet our 'Missy', followed