The famously fluorescent green-haired musician used a monkey covering its eyes emoji as the caption. Seen all together in November 2019: Finneas, 23, and Claudia have been dating since 2018, and last year took their relationship to the next level when they moved in together Claudia also posted images from her get-together with Billie to her account, which apparently took place weeks ago at a Justin Bieber concert. Finneas, 23, and Claudia have been dating since 2018, and last year took their relationship to the next level when they moved in together. To mark the occasion, the pair launched a podcast called We Bought A House.