The current duet started recording in late NUMBER@1 with PERSON@1 and PERSON@2 -LRB- then NUMBER@2 and NUMBER@3 years old respectively -RRB- , and released an album called MISC@1 tierisch in March NUMBER@4 .

The current duet started recording in late NUMBER@1 with PERSON@1 and PERSON@2 -LRB- then NUMBER@2 and NUMBER@3 years old respectively -RRB- .
