Create a whimsical birthday-themed illustration featuring playful elements. The centerpiece is a joyous birthday cake, decorated with a striking lightning bolt pattern and half-crescent shapes reminiscent of footballs, symbolizing a passion for sports. The cake comprises two tiers, each subtly numbered '5' and '0', topped with a banner that unfurls the heartfelt message 'Happy Birthday'. The backdrop bursts with cheerful motifs of musical notes and a ghostly outline of a football pitch, subtly incorporating the unique blend of two worlds - music and sports into the revelry. Be sure to avoid any specific likenesses to public figures or copyrighted content in the images.

Generated with these themes: David bowie, Wimbledon football club, and 50.

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