Kammala jumla mai zuwa: A Wasannin Olympics na bazara na 2012 a London, Blume ya yi gasa ga tawagar Denmark a wasanni daban-daban guda biyar. A cikin
50 mita freestyle ta kasa ci gaba bayan zafin jiki bayan ta gama 8th a cikin tserenta kuma 26th mafi sauri gaba ɗaya. A cikin tseren mita 100 na 'yanci an sake fitar da ita a zagaye na farko bayan ta gama ta 6 a cikin zafinta kuma ta 19 mafi sauri gaba ɗaya. Ta lashe zagayen ta na mita 200 na 'yanci amma ba ta ci gaba zuwa zagaye na gaba ba bayan ta gama 24th mafi sauri gaba ɗaya. A cikin 4 × 100 mita freestyle relay Blume ya yi iyo a cikin quartet na Danish tare da Mie Nielsen, Lotte Friis da Jeanette Ottesen; sun cancanci zuwa wasan karshe, wanda suka gama na shida, suna kafa sabon tarihin Danish na 3:37.45. A cikin 4 × 100 mita medley relay Blume, Nielsen, Ottesen da Rikke Pedersen sun kai wasan karshe kuma sun gama na bakwai. Daga baya a cikin 2012 ta lashe lambar zinare a Gasar Zakarun Duniya a Gasar Zakarun Duniya a tseren tseren mita 4 × 100. Ta kuma lashe lambar tagulla a tseren tseren mita 4 × 50.