Geri Halliwell-Horner’s daughter Bluebell proved she’s all grown up as she stepped out for a rare public appearance following this year’s BRIT Awards in Manchester. The teenager joined a whole host of stars at the Warner Music and Hennessy afterparty, turning heads with a confident look that made her seem every bit the pop star in her own right.  Wearing black sunglasses and a striking leather jacket, Bluebell looked effortlessly cool as she mingled among music’s biggest names, including Dua Lipa, at the star-studded celebration.  The event at the Cut and Craft, which was attended by HELLO!, saw the likes of Lennon and Gene Gallagher, Dua and Rina Lipa, James Blunt, Rosé, Cush Jumbo, AJ Odudu, and Harris Dickinson and his girlfriend Rose Gray.  At the party, Bluebell was seen drinking and dancing with her pal Amelia White, as the pair made their way around the room, mingling with guests.  Bluebell’s private life Despite partying with an A-list crowd, it seems Bluebell is studying English literature at university, suggesting she may be carving out a …