The ornamental design for a showerhead, as shown and described.
In a preferred embodiment, the nature of this product is as a showerhead primarily useful for enabling a water spray from a ceiling or wall mounted fitting.
FIG. 1 is a top, left, front perspective view of a showerhead according to our new design;
FIG. 2 is a left side elevational view thereof, the right side elevational view thereof being a mirror image of the left side shown;
FIG. 3 is a top perspective view thereof;
FIG. 4 is a bottom perspective view thereof;
FIG. 5 is a front perspective view thereof; and,
FIG. 6 is a rear perspective view thereof.
The broken line representations in the figures are for the purpose of illustration only, and form no part of the claimed design.