Hollywood on Parade (1932–1934) is a series of short subjects released by Paramount Pictures.
One short (# B-9) is frequently misidentified as future Stooge Curly Howard's first appearance on film, as cited by historians (he replaces Shemp).
This is because it was mistaken for a 1932 short when Criterion Pictures acquired the shorts for television distribution in the early 1950s, and slapped a generic title card on all films in this series with a 1932 copyright notice.
In fact, # B-9 was a 1934 Paramount release, and most likely filmed during a loan-out period for Howard from MGM, around the same time Ted Healy and the Three Stooges costarred in Myrt and Marge (1933) for Universal Studios.
The other is a Paramount short film Musical Justice (1931), in which Mae Questel portrays Betty Boop.