Social media sensation Rafaella, who has carved out a career in modelling, has been cheering on the Samba Boys throughout their time in Qatar.
And in her latest snap she showed off her beach body when wearing a bikini to help motivate Neymar and Co.
Not that Brazil need to be motivated for an occasion such as this.
Brazil are targeting a first World Cup win since 2002 and are the favourites to bring the trophy home with them.
They were beaten by Belgium at their last attempt to land the Jules Rimet trophy in 2018.
Talisman Neymar returned against South Korea as Tite’s side ran out 4-1 victors with a stunning first-half display putting the game to bed early on.
Rafaella, 26, has 5.7million followers on her Instagram page.
Brother Neymar has fallen ill or been suspended on a number of occasions around the time of his sister’s birthday – leading to the labelling of the time around Rafaella’s birthday as a “curse.”