Woa, Britney's really getting it together now! TMZ says she is prepping for a bit part on CBS's How I Met Your Mother. Maybe Neil Patrick Harris will whip her into shape. • Mischa Barton loves her some musicians. Her last boyfriend was the elephantine-balled Whitestarr frontman, Cisco Adler, and now Mischa's reportedly dating Rooney guitarist Taylor Locke. • Despite British web reports to the contrary, George Clooney and girlfriend Sarah Larson are not engaged. [TMZ, Perez, Us]