Jacqueline "Jacka" Pfeifer (née Lölling, born 6 February 1995) is a German skeleton racer who has won numerous races and championships, including the inaugural Winter Youth Olympics skeleton competition in 2012 and the 2017 World Championships.

[2][1] Lölling raced on the Intercontinental Cup from 2011 to 2012 to 2014–15, ending with a string of three gold medals, as well as winning the Junior World Championships in 2014 at Winterberg and in 2015 at Altenberg.

Rather than follow the other ICC sliders on the North American leg of the tour, she dropped back to Europe Cup racing for the remainder of the 2014–15 season and took home a silver from the senior World Championships at Winterberg.

[2] Lölling recorded five podiums that season, finishing the overall World Cup rankings in second place with 1550 points, behind teammate Tina Hermann.

[4] She also won the pre-Olympic test event at Pyeongchang and the race at Königssee[2] on her way to the overall Crystal Globe for the 2016–17 season.