Now that Lady Gaga has been laying low lately (assuming play-fighting with Madonna on "Saturday Night Live" counts as "laying low"), our style calculators have been getting a little dusty.

Thank goodness for the newly blonde(-ish) Rihanna and her slicked-back 'do (seen yesterday outside a New York City recording studio), which at first glance does not compute.

Or does it?

After all, if you throw in a little bit of "X-Men's" Mystique (played by Rebecca Romijn) and her wet look bob, then add a pinch or two of model Alice Dellal's shaved undercut locks, you get... drum roll, please... a certain "Umbrella" singer (aka Rihanna).

See Barbie? Math's not so hard.

Pulling off this comb-over coif, however, is.

Think the hair is wild? Check out Rihanna's album cover ensemble.